Consulta: subjectFacets:"Digital image"
Registros recuperados: 13
Data/hora: 18/06/2024 01:47:01

Análisis digital de imágenes como herramienta en el estudio de cambio color de frutos en postcosecha.
Provedor de dados: 32
Autores: Loera Alvarado, Gerardo.
Se desarrollaron dos técnicas basadas en procesamiento de imágenes digitales; una para generar un modelo geométrico tridimensional en CAD y otra para generar una proyección geométrica en tres especies frutales (mango, naranja y pera). Se tomaron cuatro imágenes; una de la cara más ancha (0°) y el resto cada 90°. Los modelos se generaron dividiendo cada imagen en 8, 16 y 32 divisiones. La proyección geométrica se generó con la corrección de curvatura vertical y horizontal mediante el cálculo de la longitud del arco cada uno o dos pixeles. Se evalúo el efecto del tamaño de las imágenes al 50%, 100% y 200%. Se retiró la cubierta de los fruto y digitalizó, posteriormente se calculó el área externa. Se midió el volumen por desplazamiento de agua y en el modelo...
Palavras-chave: Área; Volumen; Imágenes digitales; CAD; Solevación; Elipse; Elipsoidal; Modelo geométrico; Proyección geométrica; Area; Volume; Digital image; Lofting; Ellipse; Ellipsoidal; Geometric model; Geometric projection; Fruticultura; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2308

Uso de imagem digital na avaliação do sistema radicular de plantas e na análise quantitativa de grãos de café.
Provedor de dados: 14
Autores: SILVA, H. C.; ANDRADE, L. R. M. de; RODRIGUES, G. C.; AZEVEDO, J. A. de; MENDES, I. de C.; GONÇALVES, M. L.
bitstream/CPAC-2009/26822/1/p2005_28.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Imagem digital; Digital image; Coffee; Growth.; Coffea Arábica; Café; Crescimento; Sensoriamento Remoto.; Raiz; Remote sensing; Roots.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569444

Uso de imagens digitais na avaliação do crescimento da taxa de cobertura do solo.
Provedor de dados: 14
Autores: FERREIRA, M. E.; ANDRADE, L. R. M. de; SANO, E. E.; CARVALHO, A. M. de; JUNQUEIRA, N. T. V.
RESUMO: Existem vários métodos para avaliar o crescimento da vegetação e a taxa de cobertura do solo. Medidas precisas e rápidas podem ser obtidas do tratamento digital de imagens geradas de câmeras fotográficas ou de vídeo. Há disponível, no mercado, diversos processadores de imagens que apresentam funções básicas semelhantes, mas com certas particularidades que poderão trazer maior benefício para o usuário, dependendo da aplicação. O SPRING, desenvolvido pelo INPE, é de domínio público, sendo mais abrangente do que um processador de imagens, incluindo funções de geoprocessamento. O ENVI foi desenvolvido para a análise de imagens multiespectrais e hiperespectrais, podendo também ser utilizado para o processamento de imagens obtidas de câmeras de vídeo,...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Imagem digital; Digital image; Plant cover; Geoprocessamento e Sensoriamento remoto: Outros.; Cerrado; Cobertura do Solo; Sensoriamento Remoto.; Remote sensing.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567065

Quantificação do índice de vazios do solo utilizando técnicas de processamento de imagens digitais.
Provedor de dados: 14
Autores: CARVALHO JUNIOR, O. A. de; CARDOSO, F. B. da F.; MARTINS, E. de S.; JUNQUEIRA, F. de F.; CARVALHO, A. P. F. de; REATTO, A.; GUIMARAES, R. F.
RESUMO: Este trabalho apresenta uma abordagem metodológica para obter o índice de vazios de solo (e) utilizando técnicas de processamento de imagens. Como esse método permite uma obtenção automática, o procedimento pode ser considerado mais fácil, mais rápido e mais preciso que técnicas convencionais. A metodologia está baseada na classificação supervisionada de áreas de vazios presentes em seções delgadas de solo. A metodologia pode ser resumida nos passos seguintes: (a) elaboração de seção delgada da amostra de solo (se a porosidade do solo tiver um padrão anisotrópico, várias lâminas devem ser confeccionadas seguindo o eixo de comprimento preferencial; (b) são fotografadas as seções delgadas e gravadas em formato digital em RGB; (c) a imagem colorida é...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Imagem digital; Digital image; Chemicophysical properties.; Cerrado; Propriedade Físico-Química; Porosidade; Sensoriamento Remoto; Solo.; Remote sensing; Porosity; Soil.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567773

Frequency demodulation on otolith numerical images for the automation of fish age estimation
Provedor de dados: 5
Autores: Troadec, Herve.
A method to assist the reading of calcified structures with digital images is proposed. An a priori growth pattern is introduced in the image processing to take into account both the variability of the ring size and the non-linearity of their growth. The introduction of biological knowledge is performed within a demodulation processing using the reciprocal growth function. The ring number is estimated by spectral analysis. The constraints introduced by the growth model are weak since they are restricted to the definition of L0, in the case of an exponential model, or of L∞ in the case of a Von Bertalanffy model. When applied to larval Dover sole otoliths (Solea solea) results close to the expert's are obtained. In the case of saithe otoliths (Pollachius...
Tipo: Text
Palavras-chave: Otolithe; Image numérique; Âge; Croissance; Solea solea / Pollachius virens; Otolith; Digital image; Age; Growth; Solea solea / Pollachius virens.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00189/30072/28560.pdf

Morphodigital Study of the Mandibular Trabecular Bone in Panoramic Radiographs
Provedor de dados: 77
Autores: Watanabe,Plauto Christopher Aranha; Issa,João Paulo Mardegan; Oliveira,Tatiane Martín de; Monteiro,Solange Aparecida Caldeira; Iyomasa,Mamie Mizusaki; Regalo,Simone Cecilio Hallak; Siéssere,Selma.
The aim of this study was to correlate the morphodigital characteristics of the trabecular mandibular bone, in this way, it is possible to observe osteoporosis clue in patients of both sex, using panoramic radiograph for analysis. The results of this study showed statistical difference between men and women considering the bone trabecular measures (p&lt;0.05), but it was not found statistical difference between the sides in each analyzed group (p&gt;0.05). Male group presented a more strongly trabecular and complex bone than the female group, this finding is important index to osteoporotic risk, being possible to affirm that the male bone is less probable to suffer a osteoporotic fracture
Tipo: Journal article
Palavras-chave: Mandible; Bone; Digital image; Radiograph.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000400031

枝肉横断面撮影装置で撮影されたデジタル画像を利用したBCSナンバーの判定
Provedor de dados: 19
Autores: 口田, 圭吾; 長谷川, 未央; 鈴木, 三義; 三好, 俊三; KUCHIDA, Keigo; HASEGAWA, Mio; SUZUKI, Mitsuyoshi; MIYOSHI, Shunzo.
デジタルカメラと照明装置とを一体化した枝肉横断面撮影装置（以下，撮 影装置）を，より多くの枝肉に適用可能とするよう改良し，得られた画像を利用し て，牛肉色基準（BCS）ナンバーを推定することを目的とした．撮影装置は，リング 照明方式を採用し，装置の高さを従来型より12cm低い33cmとした．内部には，1,002 個の白色発光ダイオードが配置され，均一で安定した光を枝肉横断面に照射可能であ る．BCS標準模型について撮影装置からの画像より得られた赤（R），緑（G），青 （B）各階調値および輝度とBCSナンバーとの相関係数は，それぞれ-0.98，-0.91， -0.82および-0.99であり，BCSナンバーと輝度との関係がもっとも直線的であっ た．北海道内の食肉処理場において，第6-7肋骨横断面の画像を採取し（n＝ 1,208），変数逐次増減法による重回帰分析を行い，BCSナンバーを画像解析形質から 推定した．推定されたBCSナンバーと格付員によるそれとが一致した割合は76.8%，そ れが±1以内であった割合は，100.0%となった． The photographing equipment integrating the digital camera and the illumination device for the cross section of carcass was able to take a clear image. The first aim of this study was to improve the photographing equipment in order to adapt for more carcasses. The second aim was to predict...
Palavras-chave: Beef Color Standard; Image analysis; Digital image.
Ano: 2001
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/949

MEASURING COLOR HUE IN ‘SUNRISE SOLO’ PAPAYA USING A FLATBED SCANNER
Provedor de dados: 94
Autores: OLIVEIRA,THIAGO DE PAULA; ZOCCHI,SILVIO SANDOVAL; JACOMINO,ANGELO PEDRO.
ABSTRACT  Color hue is a variable frequently used postharvest to assess the physiological maturity of various fruits. In general, mean color hue is quantified by visual techniques, but this method, based on human grading, is tedious and may be erroneous. The color of fruit peel is frequently determined at four points randomly distributed on the equatorial region of a fruit, but this practice can lead to biased results because these points represent the equatorial region only and not the total area of the fruit peel. Consequently, this bias is not due to equipment measurement errors, but to the bias in the sampling process of the points on the fruit epidermis. An alternative to such methods is the digital image which provides information about all regions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Postharvest; Hue color; Circular data; Digital image; Colorimeter.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200304

The impact of eggshell colour and spot area in Japanese quails: II. Slaughter and carcass characteristic
Provedor de dados: 96
Autores: Alasahan,Sema; Akpinar,Gulsen Copur; Canogullari,Sibel; Baylan,Mikail.
ABSTRACT This study was carried out to investigate the effects of eggshell colour and spot properties (colour and size of the spot area) on growth performance and carcass traits of Japanese quail (Coturnix coturnix japonica) eggs. Study material were allocated to five groups according to their eggshell and spot colours: black spots on greyish white coloured eggshell (I), blue spots on greyish white coloured eggshell (II), diffuse brown spots on greyish brown coloured eggshell (III), brown spots on light green colored eggshell (IV), and small brown spots on greyish brown coloured eggshell (V). The size of the spotted area was determined in each egg group using digital image analysis. The groups did not differ for body weight and length of the shank at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digital image; Growth performance; Quail; Spot colour.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900509

Grapevine root distribution in drip and microsprinkler irrigation
Provedor de dados: 63
Autores: Bassoi,Luis Henrique; Hopmans,Jan W.; Jorge,Lúcio André de Castro; Alencar,Cristina Miranda de; Silva,José Antonio Moura e.
Grape (Vitis vinifera L.) yield and its quality are dependent of the status of the root system. Root distribution information is also valuable for soil and water management. An analysis of methods to evaluate the root distribution of grapevines for both, drip and microsprinkler irrigation in a Typic Acrustox is presented for the table grape cv. Italia grafted on the rootstock IAC-313, in northeastern Brazil. Measured root parameters using the monolith method were root dry weight (Dw) and root length density (Lv), while root area (Ap) was estimated using the soil profile method in combination with digital image analysis. For both irrigation systems, roots were present to the 1 m soil depth and extended laterally to 1 m distance from the trunk, but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera L.; Root system; Digital image.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200024

Biological associations of color variation in the Indo-Pacific swimming crab Charybdis hellerii
Provedor de dados: 42
Autores: WATANABE,TIMOTEO T.; ZARA,FERNANDO J.; HATTORI,GUSTAVO Y.; TURRA,ALEXANDER; SANT'ANNA,BRUNO S.
A marine biological invasion is a natural process accelerated by human activities, and the crab Charybdis hellerii is an example of a globally widespread invasive species. This study evaluated color variation in C. hellerii and its relationship to the sex, size and sexual maturity of these crabs, and compared the efficiency of a freeware digital image-editing program with a commercially available program. The color of the individuals was analyzed using standardized digital images. The color pattern varied significantly with size; smaller and immature individuals were darker than larger and mature ones. The female abdomen changed in morphology and color with sexual maturity, becoming wider and orange-colored. There was no statistical difference in the color...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Coloration variation; Digital image; Portunidae.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100219

An instrumental set up for seed germination studies with temperature control and automatic image recording
Provedor de dados: 61
Autores: Teixeira,Pedro C.N.; Coelho Neto,José A.; Rocha,Humberto; Oliveira,Juracy M. de.
This paper describes a new instrumental methodology proposed for the study of seed germination which can be applied to germination physiology, agriculture and forest restoration. This instrument performs the recording of images of germinating seeds through the use of a flat-bed scanner coupled to a computer, where a specific program commands the capture of these images at predetermined time intervals. These images are archived for posterior analysis. The device allows the collection of data and the elaboration of germination curves with high accuracy. Furthermore, the device permits the study of seed germination over a broad range of temperatures as well as the easy application of chemical agents to the seeds in order to study their influence on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digital image; Lactuca sativa; Scanner; Siegel's test; Thermal gradient tables.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000200002

Commercial Digital Camera to Estimate Postharvest Leaf Area Index in Vitis vinifera L. cv. Cabernet Sauvignon on a Vertical Trellis
Provedor de dados: 117
Autores: Espinosa L.,Miguel; Acuña C.,Eduardo; Espinosa B.,Miguel; Barrera B.,Juan.
The leaf area index (LAI) of a vineyard (Vitis vinifera L.) cv. Cabernet Sauvignon located in the commune of Cauquenes, Maule Region in Chile, was estimated from digital images obtained with a commercial camera using two indirect methods: Leaf Area Gap and Brightness (LAGB) and -Photogrammetric Leaf Area Quantification System (PLAQS). The latter requires deleafing of the grapevine. In a normalized difference vegetation index (NDVI) map, three points of vine vigor were selected: high, medium, and low for which horizontal and vertical images were obtained. Images were filtered with the Arc View GIS 3.1 program to provide only leaf images and corresponding pixel numbers. Image area and square meters per linear meter were calculated. The best models were...
Tipo: Journal article
Palavras-chave: Vitis vinifera; Leaf area index; Digital image; Photographic camera.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200015