Consulta: subjectFacets:"Image processing"
Registros recuperados: 47
Data/hora: 10/06/2024 18:19:37

Análise do tamanho e distância entre fragmentos florestais na bacia hidrográfica do Rio Una
Provedor de dados: 25
Autores: Catelani, Celso de Souza; Batista, Getulio Teixeira.
This article characterized the forest fragments of Una River hydrographic basin, affluent of the Paraíba do Sul River. Results showed that the average mean size of all fragments is 9.06 ha and that the correlation to the circular shape is 0.68 and the mean nucleus area of fragments considering a border effect of 60m is 5.86 ha. The mean distance among them is 245m. These parameters indicate that this basin has elongated fragments, with high border effect and may be in risk of biodiversity erosion. The image showing the different size classes of fragments allowed spatial observation of critical areas of the basin in ecological sustainability risk. The computing tools proved to be useful and easy to use as long as a previous georeferenced data basis is...
Tipo: Article
Palavras-chave: Remote sensing; Image processing; SIG processamento de imagens sensoriamento remoto GIS.
Ano: 2007
URL: http://hdl.handle.net/2315/84

Análisis espacio-temporal del paisaje en la microcuenca dos afonsos - municipio de redençao da serra - Sp
Provedor de dados: 25
Autores: Biffi, Pedro Victor Barreto; Rossin, Sergio; Valerio, Mario.
In this project "space-temporary Analysis of the landscape in the basin Dos Afonsos" was analyzed the patterns of change of use of the soils and the fragmentation of the wood, located in the basin Dos Afonsos, and inside the limits of the Redençao da Serra district that belongs to the Região do Vale do Paraíba-SP state. For it a was carried out an multitemporal analyzed on an area approximated of 6802,59 of hectares, using for that program SPRING, for the image of Landsat processing of the followings years 1984, 1994, 2005 and the images of CBERS of the 2005 years The analysis of detection of changes was made for the followings classes: Lake - Lagoon, Macrophytes, Wood, Grass, degraded Grass, implanted Grass, Burned, reforests and Bare soils. Concluding...
Tipo: Article
Palavras-chave: Remote sensing; Soils; Processamento de imagens; Sensoriamento remoto; The basin; Image processing.
Ano: 2007
URL: http://hdl.handle.net/2315/111

Procedimento para minimização do efeito de alta freqüência resultante de fusão entre bandas TM Landsat e pancromáticas Spot e Quickbird
Provedor de dados: 25
Autores: Sestini, Marcelo Francisco; Ferri, Clotilde Pinheiro.
The image fusion is a technique used to integrate images at different spatial resolutions to obtain better spatial information with spectral characteristics of the targets and is a important tool for environmental studies, including drainage and hydric resources. The IHS transformation is a technique used for to integrate images of different spatial resolution, but the resultant images presents redundant areas enhancement, due to abrupt transitions caused to high tonal variations. In this study, a procedure is described which aims to smooth the spatial high frequency areas and to improve the image quality, reducing the footprint by low pass filters. The study area is Igaratá and Jacarei cities, in São Paulo State, and and was applied a merge of Landsat TM...
Tipo: Article
Palavras-chave: IHS transformation; Fusão de imagens; Remote sensing; Image processing; Image fusion; Sensoriamento remoto; Processamento de imagens; Transformação IHS.
Ano: 2007
URL: http://hdl.handle.net/2315/77

Application of x-ray computed tomography in the evaluation of soil porosity in soil management systems
Provedor de dados: 70
Autores: Beraldo,José M. G.; Scannavino Junior,Francisco de A.; Cruvinel,Paulo E.
The study aimed to evaluate a methodology to quantify the porosity of the soil using computed tomography in areas under no-tillage, conventional tillage and native forest. Three soil management systems were selected for the study: forest, conventional tillage and no-tillage. In each soil management system, undisturbed soil samples were collected in the surface layer (0.0 to 0.10 m). The tomographic images were obtained using a X-ray microtomography. After obtaining the images, they were processed, and a methodology was evaluated for image conversion into numerical values. The statistical method which provided the greatest accuracy was the percentile method. The methodology used to analyze the tomographic image allowed quantifying the porosity of the soil...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Precision farming; Image processing; X-ray microtomography; Macroporosity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600012

DEVELOPMENT OF A TRANSFER FUNCTION FOR WEIGHT PREDICTION OF LIVE BROILER CHICKEN USING MACHINE VISION
Provedor de dados: 70
Autores: Amraei,Somaye; Mehdizadeh,Saman A.; Nääs,Irenilza de A.
ABSTRACT The objective of this study was to process digital images to investigate the possibility of broilers body weight estimation based on the dynamic model. For this experiment, 2440 images were recorded by a top-view camera from 30 birds. An ellipse fitting algorithm was applied to localize chickens within the pen, by using a generalized Hough transform. Chickens’ head and tail were removed efficiently using the Chan-Vese method. After that, using image processing, six body measures were calculated. Next, they were used to design a Transform Function (TF) model with weight measurements as output. Second-order dynamic models were used to predict the weight of life broiler chicken, without delay, stable and with the highest R2 were predominantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Automatic weight estimation; Image processing; Ellipse fitting; Transfer function modeling.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000500776

Image analysis for assessing broiler breeder behavior response to thermal environment
Provedor de dados: 70
Autores: Nääs,Irenilza de A.; Laganá,Marcus; Mollo Neto,Mario; Canuto,Simone; Pereira,Danilo F.
The research proposes a methodology for assessing broiler breeder response to changes in rearing thermal environment. The continuous video recording of a flock analyzed may offer compelling evidences of thermal comfort, as well as other indications of welfare. An algorithm for classifying specific broiler breeder behavior was developed. Videos were recorded over three boxes where 30 breeders were reared. The boxes were mounted inside an environmental chamber were ambient temperature varied from cold to hot. Digital images were processed based on the number of pixels, according to their light intensity variation and binary contrast allowing a sequence of behaviors related to welfare. The system used the default of x, y coordinates, where x represents the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Image processing; Clusters analysis.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000400001

DEVELOPMENT OF SOFTWARE FOR ANALYSIS OF BEHAVIOR AND WELFARE OF BROILERS
Provedor de dados: 70
Autores: Rodrigues,Tatiana P. N. da S.; Pandorfi,Héliton; Stosic,Borko; Lucena,Aline C. de; Rodrigues,Diogo F. B.
ABSTRACT The objective of this study was to develop a software based on image processing and computer vision techniques for monitoring the feeding/collective behavior of broilers (Cobb) and validate it based on the results obtained from the visual analysis of an expert. The visual analysis was performed based on the observation and quantification of behaviors in the interval of 10 min at each hour of the day, in the period of 24 hours, totaling 1728 frames/day, for males and females. The software was developed using the Hoshen-Kopelman algorithm, for labeling clusters, which would basically be the grouping of similar pixels. This software is written in the 1999 standard of the C language. After this stage of programming, the Hoshen-Kopelman algorithm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler farming; Image processing; Lighting system; Computer vision.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600657

Nonlinear correlation by using invariant identity vectors signatures to identify plankton
Provedor de dados: 72
Autores: Fimbres-Castro,Claudia; Álvarez-Borrego,Josué; Vázquez-Martínez,Irene; Espinoza-Carreón,T. Leticia; Ulloa-Pérez,A. Elsi; Bueno-Ibarra,Mario A.
In this paper a new methodology to recognize radk&gt;larians is presented. This system is invariant to position, rotation and scale by using identity vectors signatures (Is) obtained for both the target and the problem image. In this application, / is obtained by means of a simplification of the main features of the original image in addition of the properties of the Fourier transform. Identity vectors signatures are compared using nonlinear correlation. This new methodology recognizes objects in a more simple way. It has a low computational cost of approximately 0.02 s per image. In addition, the statistics of Euclidean distances is used as an alternative methodology for comparison of the identity vectors signatures. Also, experiments were carried out in...
Tipo: Journal article
Palavras-chave: Image processing; Invariant digital system; Pattern recognition; Plankton identification.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000200005

Metodologia para processamento de imagens digitais do sistema radicular de milho e sorgo utilizando a plataforma Digital Imaging of Root Traits (DIRT).
Provedor de dados: 14
Autores: SANTOS, T. T.; SOUSA, S. M. de; CAMPOLINO, M. L.; LANA, U. G. de P.; COELHO, A. M.
Neste trabalho, apresentamos uma nova metodologia para segmentação e identificação de itens em imagens, baseada em aprendizado de máquina, que é mais robusta que a metodologia de pré-processamento de imagens originalmente proposta para o DIRT.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Metodologia; Processamento de imagem digital; Digital Imaging of Root Traits; Raiz de planta; Aprendizado de máquina; Shovelomics; Árvore de decisão; Image processing; Machine learning; Decision tree; Fósforo; Digital images; Phosphorus; Roots; Image analysis.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117049

Aplicação de imagens hiperespectrais na detecção de fungos e na predição de micotoxinas em grãos de trigo.
Provedor de dados: 14
Autores: BARBEDO, J. G. A.; TIBOLA, C. S.; LIMA, M. I. P. M.
Estado da arte da detecção de doenças e micotoxinas em grãos de trigo utilizando imagens hiperespectrais. Métodos rápidos para detecção de giberela e predição do nível de DON. Discussão, tendências e perspectivas. Conclusões.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Espectroscopia de infravermelho próximo; Deoxinivalenol; Doenças em trigo; Detecção de giberela; Processamento de imagem; Imagens hiperespectrais; Image processing; Trigo; Micotoxina; Doença de Planta; Near-infrared spectroscopy; Wheat; Mycotoxins; Image analysis; Plant diseases and disorders.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1110202

Version évolutive de l’outil opérationnel de numérisation et d’analyse semi-automatique d’images de phytoplancton, utilisant le matériel FlowCAM et le logiciel ZooPhytoImage. Nouvelles perspectives
Provedor de dados: 5
Autores: Wacquet, Guillaume; Grosjean, Philippe; Colas, Florent; Hamad, Denis; Artigas, Luis Felipe.
The coupled system FlowCAM/ZooPhytoImage has become a real operational tool in 2014. However, to be fully adapted to the observations of phytoplankton performed in the context of the REPHY observation network and in order to better respond to present and future requests concerning the evaluation of quality of coastal and marine waters within the European requirements, such as the WFD and MSFD, new functionalities must be integrated into existing tools. Therefore, different axis of development have been proposed by UMONS and Ifremer to adapt both the digitization device and the Zoo/PhytoImage software to the constraints defined by the REPHY. First, version 5 of Zoo/PhytoImage contains recent innovations such as the development of routines to automatically...
Tipo: Text
Palavras-chave: Plancton; Analyse automatisée; Analyse d'image; Classification supervisée; Apprentissage actif; Dénombrement de cellules; Plankton; Automated analysis; Image processing; Supervised classification; Active learning; Cells counting.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00389/49986/50573.pdf

Temporal and spatial changes of seagrass meadows in a Mediterranean coastal lagoon
Provedor de dados: 5
Autores: Agostini, S; Marchand, B; Pergent, G.
Aerial photographs and in situ data of the Urbinu Lagoon (one of the largest and deepest ponds in Corsica, Mediterranean Sea) permit the establishment of a cartography of its aquatic benthic assemblages and types of sea-beds. It was possible to distinguish in the photographs submerged structures such as: sand, pebbles, mud and seagrass meadows. Seagrass beds were the predominant vegetation type in this lagoon (comprising 14-29% of the total area depending on the year studied), and their distribution was incorporated into a geographical information database, and then compared with historical data. Temporal and spatial change in seagrass meadows was assessed between 1990 and 1997. Change in total extent was evaluated through a map to map comparison of data...
Tipo: Text
Palavras-chave: Phanérogames; Lagune méditerranéenne; Traitement d’image; Évolution d’écosystème; Seagrasses; Mediterranean lagoon; Image processing; Change detection.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43296/43032.pdf

The circlet transform: A robust tool for detecting features with circular shapes
Provedor de dados: 5
Autores: Chauris, H.; Karoui, Imen; Garreau, Pierre; Wackernagel, H.; Craneguy, Philippe; Bertino, L.
We present a novel method for detecting circles on digital images. This transform is called the circlet transform and can be seen as an extension of classical 1D wavelets to 2D; each basic element is a circle convolved by a 1D oscillating function. In comparison with other circle-detector methods, mainly the Hough transform, the circlet transform takes into account the finite frequency aspect of the data; a circular shape is not restricted to a circle but has a certain width. The transform operates directly on image gradient and does not need further binary segmentation. The implementation is efficient as it consists of a few fast Fourier transforms. The circlet transform is coupled with a soft-thresholding process and applied to a series of real images...
Tipo: Text
Palavras-chave: Circlet transform; Circle detection; Image processing; Multi-scale representation; Computer vision.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14451/11752.pdf

Dynamique sédimentaire multiclasse : de l’étude des processus à la modélisation en Manche
Provedor de dados: 5
Autores: Blanpain, Olivier.
The purpose of this work is the implementation of a sediment transport model in the English Channel. The design of such a model requires the identification of the physical processes, their modelling and their in-situ validation. Because of the sedimentary particularities of the study area, modelling of the mechanical behaviour of a non uniform mixture of sediments and particularly of the fine grains within a coarse matrix is required. This study focused on the characterization of the relevant processes by acquisition of experimental and in-situ data. Data acquired in hydro-sedimentary conditions comparable to those found in the English Channel are scarce. A new instrument and image processing technique were specifically conceived and implemented in-situ to...
Tipo: Text
Palavras-chave: Manche; Sédiment multiclasse; Modélisation numérique; Morphodynamique; Charriage; Tri sédimentaire; Mesures in-situ; Traitement d’images; Mesures en canal; English Channel; Graded sediment; Numerical modelling; Morphodynamics; Bedload; Sediment sorting; In-situ data; Image processing; Flume experiments.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00003/11426/7962.pdf

Assessing the Accuracy of High Resolution Digital Surface Models Computed by PhotoScan((R)) and MicMac((R)) in Sub-Optimal Survey Conditions
Provedor de dados: 5
Autores: Jaud, Marion; Passot, Sophie; Le Bivic, Rejanne; Delacourt, Christophe; Grandjean, Philippe; Le Dantec, Nicolas.
For monitoring purposes and in the context of geomorphological research, Unmanned Aerial Vehicles (UAV) appear to be a promising solution to provide multi-temporal Digital Surface Models (DSMs) and orthophotographs. There are a variety of photogrammetric software tools available for UAV-based data. The objective of this study is to investigate the level of accuracy that can be achieved using two of these software tools: Agisoft PhotoScan((R)) Pro and an open-source alternative, IGN((c)) MicMac((R)), in sub-optimal survey conditions (rugged terrain, with a large variety of morphological features covering a range of roughness sizes, poor GPS reception). A set of UAV images has been taken by a hexacopter drone above the Riviere des Remparts, a river on...
Tipo: Text
Palavras-chave: Image processing; SfM photogrammetry software; Digital Surface Model; UAV; Orthophoto; Accuracy assessment.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00639/75081/75581.pdf

Statistical Descriptors of Ocean Regimes From the Geometric Regularity of SST Observations
Provedor de dados: 5
Autores: Ba, Sileye O.; Autret, Emmanuelle; Chapron, Bertrand; Fablet, Ronan.
In this letter, we evaluate to which extent the activity of ocean fronts can be retrieved from the geometric regularity of ocean tracer observations. Applied to sea surface temperature (SST), we propose a method for the characterization of this geometric regularity from curvature-based statistics along temperature level lines in front regions. To assess the effectiveness of the proposed descriptors, we used six years (from 2003 to 2008) of daily SST observations of the regions of Agulhas in the South of Africa and of Malvinas off the southern Brazilian coast. These experiments stress the relevance of geometric regularity features of tracer observation at ocean surface to characterize seasonal variations in ocean regimes.
Tipo: Text
Palavras-chave: Geosciences and remote sensing; Image analysis; Image classification; Image processing; Oceans; Ocean temperature; Sea surface.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00109/21993/20230.pdf

Reproductive dynamics of swordfish (Xiphias gladius) in the southwestern Indian Ocean (Reunion Island). Part 2: fecundity and spawning pattern
Provedor de dados: 5
Autores: Poisson, Francois; Fauvel, Christian.
Batch fecundity and relative fecundity of swordfish (Xiphias gladius) in the southwestern Indian Ocean were estimated from seven gravid swordfish females (size range 127-225 cm lower jaw-to-fork length, LJFL) with unovulated, hydrated oocytes collected onboard Reunion-based (France) longline swordfish fishing vessels between December 1999 to January 2001. To investigate the spawning pattern of swordfish, we used data collected through a combination of two at sea sampling regimes. A total of 17 007 geo-located size data of swordfish were recorded during 8 years (1993-2001) and a total of 1727 (size range 75-289 cm, LJFL) swordfish gonads (1107 females and 620 males) were sampled from May 1998 to January 2001. The estimated batch fecundity ranged from 995...
Tipo: Text
Palavras-chave: Xiphias gladius; Swordfish; Reproductive strategy; Gravimetric method; Image processing; Spawning frequency; Indian Ocean; Fecundity; Reproduction.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6354.pdf

Directional short wind wave spectra derived from the sea surface photography
Provedor de dados: 5
Autores: Yurovskaya, M. V.; Dulov, V. A.; Chapron, Bertrand; Kudryavtsev, V. N.
New field measurements of 2-D wave number short wind wave spectra in the wavelength range from few millimeters to few decimeters are reported and discussed. The measurement method is based on stereophotography and image brightness contrast processing. As found, the spectra of decimeter waves are almost isotropic and weakly dependent on the wind speed. Both directional anisotropy and wind sensitivity rapidly increase at wave numbers larger than 100 rad/m. These aspects are consistent with other previously reported optical and radar data. Following these new in situ measurements, a revision of a semiempirical model of short wind wave spectrum is suggested. This revised model can readily be implemented in other studies (radar scattering, air-sea interaction...
Tipo: Text
Palavras-chave: Wave directional spectrum; Field measurements; Spectrum modeling; Gravity-capillary waves; Image processing.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00164/27566/25927.pdf

Observations dans les zones peu accessibles de l'environnement bathyal (biologie et geologie) grace a l'usage des soucoupes plongeantes
Provedor de dados: 5
Autores: Roux, M.
On the bathyal slope for continental margins, steep and rocky substrates punctuated with cliffs and collapsing zones are frequently found. As survey and sampling with the classical technics from the sea surface is practically impossible in such an environment, in situ exploration with a submersible allows significant advances in ecology, with implications in paleoenvironment reconstruction. Mixing of material from shallow-water and deep-sea origins into bathyal sedimentation suggests that the so-called "fossil assemblages of outer platform" were frequently misinterpreted. Dense populations of animals closely related to fossil groups which were only considered as relict of the Past ("living fossils") and previously interpreted as shallow-water inhabitants...
Tipo: Text
Palavras-chave: Continental margins; Bathyal zone; Diving; Cruises; Sedimentation; Biomass; Geology; Biology; Imaging techniques; Image processing; Marine technology; Underwater photography; Submersibles.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1138.pdf

Automating the characterisation of beach microplastics through the application of image analyses
Provedor de dados: 5
Autores: Gauci, Adam; Deidun, Alan; Montebello, John; Abela, John; Galgani, Francois.
Four sandy beaches on the island of Malta in the Central Mediterranean were regularly sampled for Large MicroPlastic (LMP) particles having a diameter between 1 mm and 5 mm, at stations located at the waterline and 10 m inshore. The 10975 extracted LMP particles were characterised (dimensions, surface roughness, colour) through unaided visual observation, microscopic analyses, and an algorithm developed within the current study. Two-thirds of the isolated particles were smooth and the majority of these belonged to the grey-white colour category, with a low degree of opaqueness and discolouration, and a high degree of transparency, suggesting that these were dominated by low-density polyethylene LMPs. Conflicting evidence concerning the relative residence...
Tipo: Text
Palavras-chave: Image processing; Microplastics; Parameterisation; Monitoring obligations; Marine litter.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62471/69557.pdf

Metodologias de procesamiento de imagenes NOAA-AVHRR y su utilizacion en aplicaciones oceanograficas y biologico-pesqueras en el Atlantico sudoccidental.
Provedor de dados: 20
Autores: Bava, J.
The objective was to use the synoptic capability of NOAA-AVHRR images, and the physical variables inferred from them, in order to achieve spatial and temporal analysis that may allow correlating the satellite variables with oceanographic processes and biological or fishing data. Methodologies of image processing were developed to make possible the use of AVHRR information for the standardized and reliable generation of Sea Surface Temperature (SST) images (using bands 3 to 5 in the thermal infrared), and water reflectance images (using optic bands 1 and 2) as an index of surface turbidity in coastal zones. A methodology was also generated in order to obtain gradients images derived from SST images, which allows the identification of oceanographic fronts....
Tipo: Theses and Dissertations
Palavras-chave: Image processing; Satellite sensing; Surface temperature; Turbidity; Reflectance; Fishery resources; Oceanic fronts; Image processing; Turbidity; Fishery resources; Reflectance.
Ano: 2004
URL: http://hdl.handle.net/1834/1467

Metodologias de procesamiento de imagenes NOAA-AVHRR y su utilizacion en aplicaciones oceanograficas y biologico-pesqueras en el Atlantico sudoccidental.
Provedor de dados: 20
Autores: Bava, J.
The objective was to use the synoptic capability of NOAA-AVHRR images, and the physical variables inferred from them, in order to achieve spatial and temporal analysis that may allow correlating the satellite variables with oceanographic processes and biological or fishing data. Methodologies of image processing were developed to make possible the use of AVHRR information for the standardized and reliable generation of Sea Surface Temperature (SST) images (using bands 3 to 5 in the thermal infrared), and water reflectance images (using optic bands 1 and 2) as an index of surface turbidity in coastal zones. A methodology was also generated in order to obtain gradients images derived from SST images, which allows the identification of oceanographic fronts....
Tipo: Theses and Dissertations
Palavras-chave: Image processing; Satellite sensing; Surface temperature; Turbidity; Reflectance; Fishery resources; Oceanic fronts; Image processing; Turbidity; Fishery resources; Reflectance; Http://aims.fao.org/aos/agrovoc/c_37359; Http://aims.fao.org/aos/agrovoc/c_15043; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_28538.
Ano: 2004
URL: http://hdl.handle.net/1834/1467

Hábitats del golfo de Ana María identificados mediante el empleo de  procesamiento digital de imágenes
Provedor de dados: 20
Autores: Ventura Díaz, Y.; Rodríguez Cueto, Y.
Durante los meses de octubre de 2011 y abril de 2012 se llevaron a cabo expediciones al golfo de Ana María para realizar una  caracterización del mismo. En dichas expediciones se tomaron como referencia una serie de estaciones de muestreo que  sirvieron de base para el levantamiento de campo realizado. Este trabajo tiene como objetivo elaborar una primera versión del  mapa de los hábitats marinos del golfo de Ana María, usando el procesamiento digital de imágenes y el muestreo de campo  mediante el empleo de sitio de muestreo. Para el cumplimiento del objetivo se tuvo en cuenta la información de los fondos  obtenidos en las clasificaciones realizadas para las áreas protegidas, Refugio de Fauna Cayos Ana María y Refugio de Fauna  Macurije-Santa María, las...
Tipo: Journal Contribution
Palavras-chave: Image processing; Maps; Site investigation.
Ano: 2012
URL: http://hdl.handle.net/1834/4634

Measuring selectivity of feeding by estuarine copepods using image analysis combined with microscopic and Coulter counting
Provedor de dados: 27
Autores: Tackx, M.L.M.; Zhu, L.; De Coster, W.; Billones, R.G.; Daro, M.H.
Although estuarine zooplankters are generally believed to be detritivorous, high clearance rates by the estuarine copepods &lt;i&gt;Eurytemora affinis&lt;/i&gt; and &lt;i&gt;Acartia tonsa&lt;/i&gt; on natural estuarine microplankton have been reported in the literature. In order to enable detection of possible selectivity for these microplankton organisms over detritus, a method that measures clearance rates on total particulate matter is proposed. Image analysis is used to measure copepod gut contents, and combined with Coulter counter measurements of total particulate matter concentration, allows one to calculate clearance rates on the latter. The first results indicate that, in the Westerschelde estuary (SW Netherlands), both &lt;i&gt;E....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuarine organisms; Feeding behaviour; Image processing; Selective feeding; Acartia tonsa; Copepoda [copepods]; Eurytemora affinis.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2632

Identifying drought events in sugarcane using drought indices derived from Modis sensor
Provedor de dados: 86
Autores: Picoli,Michelle Cristina Araujo; Duft,Daniel Garbellini; Machado,Pedro Gerber.
Abstract: The objective of this work was to evaluate the potential of several spectral indices, used on moderate resolution imaging spectroradiometer (Modis) images, in identifying drought events in sugarcane. Images of Terra and Aqua satellites were used to calculate the spectral indices, using visible (red), near infrared, and shortwave infrared bands, and eight indices were selected: NDVI, EVI2, GVMI, NDI6, NDI7, NDWI, SRWI, and MSI. The indices were calculated using images between October and April of the crop years 2007/08, 2008/09, 2009/10, and 2013/14. These indices were then correlated with the standardized precipitation-evapotranspiration index (SPEI), calculated for 1, 3, and 6 months. Four of them had significant correlations with SPEI: GVMI,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum officinarum; Drought stress; Image processing; Satellite imagery; SPEI; Warning systems.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101063

Public-domain software for root image analysis
Provedor de dados: 90
Autores: Costa,Mirian Cristina Gomes; Cunha,Isabela Maria de Lima; Jorge,Lúcio André de Castro; Araújo,Isabel Cristina da Silva.
In the search for high efficiency in root studies, computational systems have been developed to analyze digital images. ImageJ and Safira are public-domain systems that may be used for image analysis of washed roots. However, differences in root properties measured using ImageJ and Safira are supposed. This study compared values of root length and surface area obtained with public-domain systems with values obtained by a reference method. Root samples were collected in a banana plantation in an area of a shallower Typic Carbonatic Haplic Cambisol (CXk), and an area of a deeper Typic Haplic Ta Eutrophic Cambisol (CXve), at six depths in five replications. Root images were digitized and the systems ImageJ and Safira used to determine root length and surface...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Root length; Root surface area; Image processing; Root system.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500001

Use of digital images to estimate soil moisture
Provedor de dados: 91
Autores: Santos,João F. C. dos; Silva,Heider R. F.; Pinto,Francisco A. C.; Assis,Igor R. de.
ABSTRACT The objective of this study was to analyze the relation between the moisture and the spectral response of the soil to generate prediction models. Samples with different moisture contents were prepared and photographed. The photographs were taken under homogeneous light condition and with previous correction for the white balance of the digital photograph camera. The images were processed for extraction of the median values in the Red, Green and Blue bands of the RGB color space; Hue, Saturation and Value of the HSV color space; and values of the digital numbers of a panchromatic image obtained from the RGB bands. The moisture of the samples was determined with the thermogravimetric method. Regression models were evaluated for each image type: RGB,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil color; Image processing; RGB; HSV.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201051

Proposal of automated computational method to support Virginia tobacco classification
Provedor de dados: 91
Autores: Tedesco,Leonel P. C.; Freitas,Adriano da C. de; Molz,Rolf F.; Schreiber,Jacques N. C.
ABSTRACT This article proposes an automatic method for classification of cured tobacco leaves. Typically this process is performed manually, allowing the occurrence of human errors. In addition, the existence of an automated comparative procedure, helping to perform the classification, can make this process faster and more transparent. In order to implement the method, non-invasive to the agricultural product, 250 samples of Virginia tobacco digital images in the RGB and HSV color models were analyzed. The validation of the method was carried out using partial least squares (PLS) and artificial neural network (ANN), presenting a qualitative and quantitative analysis of both tools. It has been verified that the PLS can be applied to this method, as it has a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Image processing; Partial least square; Artificial neural network.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001000782

USPLeaf: Automatic leaf area determination using a computer vision system1
Provedor de dados: 124
Autores: Meira,Luiz Antonio; Pereira,Lilian Elgalise Techio; Santos,Manoel Eduardo Rozalino; Tech,Adriano Rogério Bruno.
ABSTRACT Computer vision systems based on digital image processing have been proposed as alternative tools to traditional methods to estimate leaf area, replacing the most time-consuming steps and laboring manual measurements. However, many of the available applications are still based on manual determination of leaf dimensions or require excessive and laborious user interventions before providing results. USPLeaf was designed to process images containing single or multiple leaves, and automatically determine the leaf area without user intervention. The accuracy for leaf area measurements of the software was compared to the results obtained by the standard method, an electronic planimeter (LI-3100). The vegetal species, Mavuno grass (MAV, Urochloa hybrid)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Image processing; Edge detection; Image segmentation; Information extraction.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400413

A smartphone-based apple yield estimation application using imaging features and the ANN method in mature period
Provedor de dados: 63
Autores: Qian,Jianping; Xing,Bin; Wu,Xiaoming; Chen,Meixiang; Wang,Yan'an.
ABSTRACT: Apple yield estimation using a smartphone with image processing technology offers advantages such as low cost, quick access and simple operation. This article proposes distribution framework consisting of the acquisition of fruit tree images, yield prediction in smarphone client, data processing and model calculation in server client for estimating the potential fruit yield. An image processing method was designed including the core steps of image segmentation with R/B value combined with V value and circle-fitting using curvature analysis. This method enabled four parameters to be obtained, namely, total identified pixel area (TP), fitting circle amount (FC), average radius of the fitting circle (RC) and small polygon pixel area (SP). A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Potential yield prediction model; Image processing; Mobile phone application development; Orchard precision management.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400273

AN INTELLIGENT COMPUTER VISION SYSTEM FOR VEGETABLES AND FRUITS QUALITY INSPECTION USING SOFT COMPUTING TECHNIQUES
Provedor de dados: 111
Autores: G, Narendra V.
The quality of food products is very important for the human health. The large population and the increased requirements of food products makes it difficult to arrive the desired quality. The quality inspection and sorting tons of fruits and vegetables manually is a slow, costly, and an inaccurate process. In this research a vision-based quality inspection and sorting system is developed, to increase the quality of food products. The quality inspection and sorting process depends on capturing the image of the fruits/vegetables, analyzing captured image to discard defected products in order to identify the good or bad. Four different systems for different food products have been developed namely, Orange, Lemon, Sweet Lime, and Tomato. A dataset of 1200...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture and Food quality evaluation; Image processing; Compter Vision; Soft computing Techniques Quality Inspection of fruits and Vegetables; Back propagation neural network; Probabilistic neural network.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5188

DEVELOPMENT OF A COMPUTATIONAL TOOL TO IDENTIFY NUTRITIONAL DEFICIENCIES IN CURUBA PLANTS  (Passiflora tripartita var. molissima)
Provedor de dados: 111
Autores: Roa Guerrero, Edgar Eduardo.
Nowadays, the determination of nutritional deficiencies in plants has become one of the most important analysis of crop growth. Often, this analysis is performed manually by specialized personnel for long period of time, leading to an error in the procedure. The purpose of this research is to develop a computational tool for the identification of nutritional deficiencies such as Nitrogen, Potassium and Phosphorus in Curuba plants. The methodology includes 3D designs, tool construction and the detection of nutritional deficiencies by image processing techniques in MatLab. Finally, the results obtained by the developed computational tool with respect to the data provided in a traditional way by the technical experts, presented an accuracy of 100%, 80%, 91%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Image processing; Identification of nutritional deficiencies in plants Nutritional deficiencies; Growth indices; Computational tool.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4335

Development of an automatic chili drying controller based on computer vision
Provedor de dados: 111
Autores: Kanjanawanishkul, Kiattisin.
Color of dried chilies is one of the most key factors that influences consumers’ preference. It is mainly affected by the drying process. Traditionally, drying temperature is fixed during the drying process without regard to the quality of chilies being dried. Thus, the aim of this research is to develop a controller for the chili drying process that determines the drying temperature according to the change of chili color. To measure the chili color, we built a hot air tray dryer incorporated with a computer vision system which measures the chili color during drying. We converted the RGB color model to the L*a*b* color model and calculated the change of the a* component (\delta a). If \delta a within 15 minutes was less than 2, then, the drying temperature...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dried chili color; Image processing; Drying control; Closed-loop controlthe Higher Education Research Promotion and National Research University Project of Thailand  Office of the Higher Education Commission.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5236

Mass modelling by dimension attributes for Mango (Mangifera indica cv. Zebdia) relevant to post-harvest and food plants engineering
Provedor de dados: 111
Autores: Mossad, Amr; El Helew, Waleed Kamel Mohammed; Elsheshetawy, Hemat E.; Farina, Vittorio.
Mass identification of mango fruits from their dimension attributes remains challenging.  This is because of the unregulated shapes of these fruits.  Therefore, this research aims at creating mathematical models that can demonstrate the relationship between the fruit’s mass and dimension attributes.  Hence, these models can be used in post-harvest engineering systems.  The researchers used 100 mango fruits (Mangifera indica cv. Zebdia) to determine the mathematical relationship between the fruits’ weight and dimension attributes.  The researcher measured and photographed the dimensions of these fruits and processed the image captured for each fruit using a computer program to find the fruit’s dimensions.  The results obtained led to the development of six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioprocess technology; Fruit sorting; Image processing; Physical attributes.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3483

Precision spray modeling using image processing and artificial neural network
Provedor de dados: 111
Autores: Azizpanah, Amir; Rajabipour, Ali; Alimardani, Reza; Kheiralipour, Kamran; Mohammadi, Vahid.
This study employed artificial neural network method for predicting the sprayer drift under different conditions using image processing technique. A wind tunnel was used for providing air flow in different velocities. Water Sensitive Paper (WSP) was used to absorb spray droplets and an automatic algorithm processed the images of WSPs for measuring droplet properties including volume median diameter (Dv0.5) and Surface Coverage Percent (SCP). Four Levenberg-Marqurdt models were developed to correlate the sprayer drift (output parameter) to the input parameters (height, pressure, wind velocity and Dv0.5). The ANN models were capable of predicting the output variables in different conditions of spraying with a high performance. Both models predicted the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sprayer; Drift; Image processing; Artificial Neural Network.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3261

Development of an imaging system for spatially real-time measurement of drying parameters in industrial drying units
Provedor de dados: 111
Autores: amjad, waseem; Munir, Anjum; Sturm, Barbara.
Lack of accurate information for the drying kinetics is the main barrier to optimize drying processes effectively. Online monitoring of drying data is not common due to practical issues involved in set-up application. In this study an imaging system was developed for large drying units to investigate the quality changes (color kinetics and shrinkage) combine with weight loss of food product spatially and non-destructively during convective drying. The imaging setup was used in a diagonal-airflow batch dryer and shifted along the dryer length to take data (food images and weight loss) at different positions using potato slices (5mm thick, 60°C) as drying material. First order model fitted well to value of ∆L* and ∆b* while ∆a* and ∆E fitted in zero order...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Image processing; Real time data; Drying.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5985

Improving field management by machine vision - a review
Provedor de dados: 111
Autores: Taghadomi-Saberi, Saeedeh; Hemmat, Abbas.
Growing population of people around the world and thus increasing demand to food products as well as high tendency for declining the cost of operations and environmental preserving cares intensify inclination toward the application of variable rate systems for agricultural treatments, in which machine vision as a powerful appliance has been paid vast attention by agricultural researchers and farmers as this technology consumers. Various applications have introduced for machine vision in different fields of agricultural and food industry till now that confirms the high potential of this approach for inspection of different parameters affecting productivity. Computer vision has been utilized for quantification of factors affecting crop growth in field; such...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosystems engineering Precision agriculture; Field management; Image processing; Variable rate.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3250

Moisture-dependent physical properties of Plantain (Plantago major L.) seeds by image processing analysis
Provedor de dados: 111
Autores: Fadavi, Ali; Mirzabe, Amir Hossein; Mansouri, Ali.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plantain; Image processing; Moisture content; Physical properties.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3325

Effects of some air-jet impingement parameters on the removal of sunflower seeds from the heads in linear movement
Provedor de dados: 111
Autores: Mirzabe, Amir Hossein; Chegini, Golam Reza; Massah, Jafar; Khazaei, Javad.
Due to success of air-jet application in food and agricultural sciences, a new method was invented based on the impingement jets in order to eliminate a number of problems present in mechanical methods of removing sunflower seeds from the head. When the sunflower head had linear velocity and the nozzle was fixed, the effects of the seeds’ location on the sunflower head, reservoir pressure, nozzle diameter, linear velocity of the sunflower head, and the distance between the nozzle outlet and the surface of the sunflower head on its removed area were examined. The regions removed by the impingement of the air-jet were photographed and the area of the removed regions was calculated based on the image processing technique. The results showed that the area of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sunflower; Thresher machine; Image processing; Linear velocity; Power consumption; Energy consumption.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6287

Using online image processing technique for measurement the browning in banana during drying (a new and automatic method)
Provedor de dados: 111
Autores: Ebrahimi, Mohammad Ali; Mohtasebi, Seyyed Saeed; Rafiee, Shahin; Hosseinpour, S.
Determination and controlling of quality parameters can be useful for ordering and marketing of fruits.  Color is the first and the most important parameter in the visual appearance of fruits, specifically in banana.  The aim of this study is to use image-processing technique (online operation) to measure and analyze the color change of banana slices during thin layer drying.  Using online-image-processing technique resulted in designing a machine vision system to control the color change of products automatically.  The results show a linear relation with high correlation coefficient for L*, a* and b* (0.967, 0.962 and 0.991 respectively) between the data of the image-processing technique and the hold-hand colorimeter.  In this study, parameters of chroma,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Image processing; Machine vision; Online; Banana.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2522

Leaf area estimation from linear measurements in different ages of Crotalaria juncea plants
Provedor de dados: 42
Autores: CARVALHO,JULIANA O. DE; TOEBE,MARCOS; TARTAGLIA,FRANCIELI L.; BANDEIRA,CIRINEU T.; TAMBARA,ANDRÉ L.
ABSTRACT The goal of this study was to estimate the leaf area of Crotalaria juncea according to the linear dimensions of leaves from different ages. Two experiments were conducted with C. juncea cultivar IAC-KR1, in the 2014/2015 sowing seasons. At 59, 82, 102, 129 days after sowing (DAS) of the first and 61, 80, 92, 104 DAS of the second experiment, 500 leaves were collected, totaling 4,000 leaves. In each leaf, the linear dimensions were measured (length, width, length/width ratio and length × width product) and the specific leaf area was determined through Digimizer and Sigma Scan Pro software, after scanning images. Then, 3,200 leaves were randomly separated to generate mathematical models of leaf area (Y) in function of linear dimension (x), and 800...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Non-destructive method; Image processing; Mathematical models; Model validation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401851

Characterization of volcanic structures associated to the silicic magmatism of the Paraná-Etendeka Province, in the Aparados da Serra region, southern Brazil
Provedor de dados: 42
Autores: BENITES,SUSANA; SOMMER,CARLOS A.; LIMA,EVANDRO F. DE; SAVIAN,JAIRO F.; HAAG,MAURICIO B.; MONCINHATTO,THIAGO R.; TRINDADE,RICARDO I.F. DA.
Abstract  The Paraná-Etendeka Magmatic Province is associated with the distensive tectonics that caused the rupture of the Gondwana continent during the Lower Cretaceous and generated an intense volcanism that covers South America and the NW portion of Namibia in Africa. In Brazil, this volcanic sequence is named Serra Geral Group and predominantly consists of basalts and subordinated silicic rocks. The goal of this study is to characterize the geomorphological features observed in the Aparados da Serra region, southern Brazil, and to evaluate the relationship between these structures and the primary silicic volcanic structures. The geomorphological features were first identified using remote sensing and then correlated with flow structures observed in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anisotropy of Magnetic Susceptibility; Image processing; Silicic lavas; Volcanic morphologies.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000300601

Design of a three-dimensional hand/forearm model to apply computational fluid dynamics
Provedor de dados: 52
Autores: Marinho,Daniel Almeida; Reis,Victor Machado; Vilas-Boas,João Paulo; Alves,Francisco Bessone; Machado,Leandro; Rouboa,Abel Ilah; Silva,António José.
The purpose of this study was to develop a three-dimensional digital model of a human hand and forearm to apply Computational Fluid Dynamics to propulsion analysis in swimming. Computer tomography scans of the hand and forearm of an Olympic swimmer were applied. The data were converted, using image processing techniques, into relevant coordinate input, which could be used in Computational Fluid Dynamics software. From that analysis, it was possible to verify an almost perfect agreement between the true human segment and the digital model. This technique could be used as a means to overcome the difficulties in developing a true three-dimensional model of a specific segment of the human body. Additionally, it could be used to improve the use of Computational...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Finite element modelling; Image processing; Computational fluid dynamics; Biomechanics; Swimming.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200024

A clinical gamma camera-based pinhole collimated system for high resolution small animal SPECT imaging
Provedor de dados: 56
Autores: Mejia,J.; Galvis-Alonso,O.Y.; Castro,A.A.de; Braga,J.; Leite,J.P.; Simões,M.V.
The main objective of the present study was to upgrade a clinical gamma camera to obtain high resolution tomographic images of small animal organs. The system is based on a clinical gamma camera to which we have adapted a special-purpose pinhole collimator and a device for positioning and rotating the target based on a computer-controlled step motor. We developed a software tool to reconstruct the target’s three-dimensional distribution of emission from a set of planar projections, based on the maximum likelihood algorithm. We present details on the hardware and software implementation. We imaged phantoms and heart and kidneys of rats. When using pinhole collimators, the spatial resolution and sensitivity of the imaging system depend on parameters such as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pinhole collimator; SPECT; Small animal organs; Maximum likelihood; Instrumentation; Image processing.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001200004

Predictive efficiency of distinct color image segmentation methods for measuring intramuscular fat in beef
Provedor de dados: 65
Autores: Mello,Renius; Vaz,Fabiano Nunes; Pacheco,Paulo Santana; Pascoal,Leonir Luiz; Prestes,Rosa Cristina; Costa,Patrícia Barcellos; Kipper,Djenifer Kirch.
Intramuscular fat (IMF) influences important quality characteristics of meat, such as flavor, juiciness, palatability, odor and tenderness. Thus, the objective of this study was to apply the following image processing techniques to quantify the IMF in beef: palette; sampling, interval of coordinates; black and white threshold; and discriminant function of colors. Thirty-five samples of beef, with a wide range of IMF, were used. Color images were taken of the meat samples from different muscles, with variability in the IMF content. The IMF of a thin cross-section meat was determined by chemical lipid extraction and was predicted by image analysis. The chemical method was compared with the image analysis. The segmentation procedures were validated by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tissue characterization; Meat industry; Marbling; Image processing; Meat quality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001001865

Leaf area estimation of squash ‘Brasileirinha’ by leaf dimensions
Provedor de dados: 65
Autores: Toebe,Marcos; Souza,Rafael Rodrigues de; Mello,Anderson Chuquel; Melo,Patrícia Jesus de; Segatto,Alexandre; Castanha,Ana Carla.
ABSTRACT:  The objectives of this work were estimate the leaf area of squash ‘Brasileirinha’ by linear dimensions of the leaves and check models available in the literature. An experiment was conducted in the 2015/16 sowing season. Were collected 500 leaves and in each one, were measured the length (L), width (W) and length×width product (LW) and determined the real leaf area (LA). Then, 400 leaves were separated to generate models of the leaf area (LA) as a function of linear dimension (L, W or LW) of squash. The remaining 100 leaves were used for the validation of models. A second experiment was conducted in the 2016/17 sowing season. Were collected 250 leaves, used only for the validation of the models of the first experiment. There is collinearity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita moschata; Image processing; Non-destructive method; Mathematical models.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400203

Antioxidant activity and physiological performance of popcorn seed after saline stress and analysis of seedling images
Provedor de dados: 64
Autores: Catão,Hugo Cesar Rodrigues Moreira; Caixeta,Franciele; Lopes,Amanda Moreira; Nery-Silva,Flavia Andrea; Sá Júnior,Adílio de.
ABSTRACT Salinity influences all germination stages and may adversely affect seedling establishment in the field. The objective of this research was to determine the relationship between the antioxidant activity and the physiological performance of seeds and to verify the efficacy of the imaging analysis of popcorn seedlings after seed exposure to saline stress. A completely randomized design was used that consisted of four replicates in a factorial scheme. This scheme comprised three popcorn hybrids (P618, AP6002, and AP8203) and five saline potential levels (0.0; -0.1; -0.3; -0.6, and -0.9 MPa) that were obtained from KCl solutions of different concentrations. First count germination, germination and seedling vigor classification (strong normal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays var. everta; Physiological quality; Seed vigor; Image processing; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100230