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| Registros recuperados: 126 | |
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| Brunes,André Pich; Araújo,Ádamo de Souza; Dias,Letícia Winke; Villela,Francisco Amaral; Aumonde,Tiago Zanatta. |
| ABSTRACT Seed vigour is determined by a series of laboratory tests, many of these laborious and time-consuming. In view of this, the present study aimed to compare the determination of seedling length in wheat using image processing, with the traditional method, as well as the ability of the method to determine seed vigour. The experimental design was completely randomised, with five replications comprising a single-factor experimental scheme. The data were analysed for normality by the Shapiro-Wilk test and variance analysis using ANOVA at 5% probability. The response variables were correlated using Pearson's test, and the methodologies for determining the length of the shoots and roots, by measuring with a graduated rule and by image processing, were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Matlab®; Image analysis; Vigour. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200374 |
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| Pereira,Francisco Elder Carlos Bezerra; Martins,Cibele Chalita; Jeromini,Tatiane Sanches; Gomes-Junior,Francisco Guilhien; Torres,Salvador Barros. |
| ABSTRACT Identifying fast and efficient tests to evaluate the vigor of forage grass seed lots is desirable in the quality control programs of the companies in this sector. Thus, the objective was to evaluate the efficiency of vigor tests on the physiological quality of seeds of Panicum maximum, cv. Mombasa, for the differentiation of lots and prediction of seedling emergence in the field. Nineteen seed lots were subjected to evaluations of moisture content, germination, first count, germination speed index, seedling emergence in sand, first count of seedling emergence in sand, seedling root and shoot lengths, seedling emergence in the field and computerized analysis of seedling images obtained through SVIS® software. The experimental design was completely... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Panicum maximum; SVIS®; Principal component; Vigor; Image analysis. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100407 |
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| Romualdo,Liliane Maria; Luz,Pedro Henrique de Cerqueira; Baesso,Murilo Mesquita; Devechio,Fernanda de Fatima da Silva; Bet,Jessica Angela. |
| ABSTRACT Image analysis can provide information extracted from the leaves of crops, and contribute to early identification of nutrient deficiency. The objective of this study was to recognize nutritional nitrogen (N) patterns in maize plants, at the V4 and V7 stages, using digital image analysis based on spectral indexes. The experiment was carried out in a greenhouse under hydroponic cultivation. Treatments consisted of a completely randomized design, in a 4 × 2 factorial arrangement, with four replications. The factors were constituted by the doses of N (0; 3.0; 6.0 e 15 mmol L-1) combined at V4 and V7. In each stage, digital images were taken of leaf blades, with subsequent chemical composition and image analysis. For image recognition and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Image analysis; Mineral nutrition; Image processing.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200183 |
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| Teira,Gustavo Adolfo; Tinois,Eduardo; Lotufo,Roberto de Alencar; Felício,Pedro Eduardo de. |
| For several decades, beef carcass evaluation for grading or research purposes has relied upon subjective visual scores, and manually taken measurements, but in recent times there has been a growing interest in new technologies capable of improving accuracy of estimates. Equations to predict weight and yield of beef pistol subprimal cuts were developed in this work using digital image analysis (VIA) of the 12th rib steak. Equations to predict total pistol subprimal cuts weight (CUTS) had coefficients of determination (CD) of 0.84, or 0.87 to 0.88, when the independent variables were the VIA parameters and the half carcass weight (HC) or the total pistol weight (TP), respectively. The predicted values for the total seven subprimal cuts, as a percentage of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef industry; Beef carcass; Image analysis; Rib eye area; Fat thickness. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200028 |
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| Cooper,Miguel; Rosa,Jaqueline Dalla; Medeiros,João Carlos; Oliveira,Thalita Campos de; Toma,Raul Shiso; Juhász,Carlos Eduardo Pinto. |
| The study of the hydro-physical behavior in soils using toposequences is of great importance for better understanding the soil, water and vegetation relationships. This study aims to assess the hydro-physical and morphological characterization of soil from a toposequence in Galia, state of São Paulo, Brazil). The plot covers an area of 10.24 ha (320 × 320 m), located in a semi-deciduous seasonal forest. Based on ultra-detailed soil and topographic maps of the area, a representative transect from the soil in the plot was chosen. Five profiles were opened for the morphological description of the soil horizons, and hydro-physical and micromorphological analyses were performed to characterize the soil. Arenic Haplustult, Arenic Haplustalf and Aquertic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ultisol; Alfisol; Water retention; Soil functioning; Image analysis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000200011 |
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| Kim,Jaeyoung; Kim,Ki-Seung; Kim,Yoonha; Chung,Yong Suk. |
| ABSTRACT Drought is a major threat worldwide for crop production, especially due to the rapid climate changes. Current drought solutions involve improving irrigation system, rainwater harvesting, damming, cloud seeding, and changes of cultivation methods. Despite effective, each solution has economic, environmental, and temporal drawbacks. Among all solutions, the most effective, inexpensive and manageable method is the use of drought-tolerant cultivars via plant breeding. However, conventional plant breeding is a time-consuming and laborious task, especially for phenotypic data acquisition of target traits of numerous progenies. High-throughput phenotyping (HTP) is a recently developed method and has potential to overcome the mentioned issues. HTP offers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sensors; Remote sensing platforms; Image analysis; Drought solution; Plant breeding. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000401801 |
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| Martins,Saulo Muniz; Brito,Giovani Greigh de; Gonçalves,Washington da Conceição; Tripode,Bruna Mendes Diniz; Lartaud,Marc; Duarte,João Batista; Morello,Camilo de Lelis; Giband,Marc. |
| ABSTRACT: The root system architecture (RSA) of plants and its functioning play a fundamental role in a number of plant growth mechanisms including water and nutrient uptake. Optimization of the RSA is important for stable and increased plant productivity under adverse conditions. Despite its great importance, studying the RSA is notoriously laborious because of the difficulty of accessing the rooting system of plants. We developed a root phenotyping platform, PhenoRoots, which allows for the non-invasive study of plant RSA. The system was built using inexpensive material and was designed to provide medium throughput. Substrate or soil-filled rhizotrons are used to grow plantlets, whose roots are directly visible through a glass plate. An experiment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhizotron; Root traits; Image analysis; Medium-throughput; Cotton. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000501101 |
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| TSUCHIYA,Akio; HIRABUKI,Yoshihiko; NISHIZAWA,Toshie; LISBOA,Pedro Braga; SILVA,Carlos Rosário da. |
| In order to compare the development of strata in the early stages of secondary forest succession with vessel parameters of the tree species, a forest inventory was carried out in 4-year (Q1: 48 m2), 11-year (Q2: 400 m2) and 20-year (Q3: 400 m2) forests and vessel parameters were investigated from stem cross sections of 18 species obtained in Q2. Thirty three species (21 families), 77 species (35 families), 39 species (20 families) were found in Ql, Q2, Q3, respectively. The percentage of dead individuals, dead stems and the percentage of individuals with multiple stems increased with time after clear cutting. Also, the total D2H of Q3 was 26.1 times that of Q1, and the development of strata started in Q2 and Q3. The image analysis of vessel size, area and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Secondary forest; Strata; Image analysis; Vessels. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000200241 |
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| SEZER,METIN; TEKELIOGLU,OGUZ. |
| The Japanese quail lays eggs with colourful and patterned shells which make the eggshell colour difficult to classify. In this study, the method of measuring colour of patchy eggs using image analyses and its power to discriminate among individual variation were established. Estimated repeatability for egg colour and proportion of patterned areas was high (>0.58), suggesting intermedíate or high heritability of eggshell colour characteristics. Three components have been identified as significant in discriminant function analysis. These three components explained 91.4% of the total variance in egg colour characteristics. In cluster analysis, 78.3% of the eggs that were collected from 15 females were correctly classified. This study indicates that... |
| Tipo: Journal article |
Palavras-chave: Eggshell colour; Image analysis; Individual variation; Repeatability. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000100010 |
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| GALLARDO-ESCÁRATE,CRISTIAN; ÁLVAREZ-BORREGO,JOSUÉ; VON BRAND,ELISABETH; DUPRÉ,ENRIQUE; DEL RÍO-PORTILLA,MIGUEL ÁNGEL. |
| In observations by confocal or conventional fluorescence microscopy, important factors should be considered in order to obtain accurate images. One of them, such as the fluorescence bleaching from highest intensity to lowest signal of fluorescence is a common problem with several DNA fluorochromes and especially for DAPI stain. The fluorescence of DAPI fades rapidly when it is exposed to UV light, under optimal conditions of observation. Although the fading process can be retarded using a mounting medium with antifading reagents, the photochemical process underlying the fluorescence decay has not yet been fully explained. In addition, no relationship between fluorescence fading and nuclear DNA content has been tested. In order to test this relationship, we... |
| Tipo: Journal article |
Palavras-chave: Nuclear DNA content; Fluorescence fading; Image analysis; DAPI. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000100004 |
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| Registros recuperados: 126 | |
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