Accurate blemish detection with active contour models

Yang, Qingsheng; Marchant, J.A.

doi:10.1016/0168-1699(95)00038-0

Cited by 29 publications

(16 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On monochrome images, as described by Yang (1994) and Yang & Marchant (1996), the apple appears in light grey, the mean luminance of the fruit varies with its colour and decreases from the centre of the fruit to the boundaries. The lenticels look like unevenness which could be assimilated to noise.…”

Section: Image Segmentationmentioning

confidence: 99%

“…After a pretreatment consisting of a median filter followed by a Gaussian filter, Yang & Marchand (1996) used the flooding technique to detect the patch-like defects, where the defects were considered as catchment basins. The detection was enhanced by using active contours algorithm (Yang & Marchant, 1996). Some small oversegmentation areas were removed by applying a threshold on the depth or the volume of the basins.…”

Section: Image Segmentationmentioning

confidence: 99%

See 1 more Smart Citation

A real-time grading method of apples based on features extracted from defects

Leemans

Destain

2004

Journal of Food Engineering

230

View full text Add to dashboard Cite

This paper presents a hierarchical grading method applied to Jonagold apples. Several images covering the whole surface of the fruits were acquired thanks to a prototype grading machine.These images were then segmented and the features of the defects were extracted. During a learning procedure, the objects were classified into clusters by k-mean clustering. The classification probabilities of the objects were summarised and on this basis the fruits were graded using quadratic discriminant analysis. The fruits were correctly graded with a rate of 73 %. The errors were found having origins in the segmentation of the defects or for a particular wound, in a confusion with the calyx end.

show abstract

Section: Image Segmentationmentioning

confidence: 99%

Section: Image Segmentationmentioning

confidence: 99%

A real-time grading method of apples based on features extracted from defects

Leemans

Destain

2004

Journal of Food Engineering

230

View full text Add to dashboard Cite

show abstract

“…Um novo projeto de análise de imagens para uma detecção mais precisa de manchas de frutas foi pesquisado por Yang e Marchant 6 . A detecção consiste em duas etapas: segmentação inicial e refinamento.…”

Section: Análise De Imagemunclassified

Análise de imagem em química analítica: empregando metodologias simples e didáticas para entender e prevenir o escurecimento de tecidos vegetais

Lupetti¹,

Carvalho²,

Moura³

et al. 2005

Quím. Nova

View full text Add to dashboard Cite

Recebido em 5/1/04; aceito em 6/8/04; publicado na web em 14/1/05 IMAGE ANALYSIS IN ANALYTICAL CHEMISTRY: DIDACTIC AND SIMPLE METHODOLOGIES TO UNDERSTAND AND PREVENT THE BROWNING OF VEGETABLE TISSUES. A simple and didactic experiment was developed for image monitoring of the browning of fruit tissues caused by the enzyme polyphenol oxidase. The procedure, easy and inexpensive, is a valuable tool to teach and demonstrate the redox reaction between the enzyme and the natural polyphenols. To obtain the browning percentage for apple, pear and banana, digital photographs were employed, and the images were analyzed by means of Monte Carlo methods and digital analysis programs. The effects of several experimental conditions were studied, such as pH, light, temperature and the presence of oxygen or anti-oxidants. It was observed that each fruit presented a different condition that better minimized the oxidation process. The absence of oxygen and the application of a bissulphite solution were sufficient to keep the quality of all fruits tested.Keywords: enzymatic browning; Monte Carlo methodology; digital image analysis. INTRODUÇÃOA Lei de Diretrizes e Bases da Educação Nacional (Lei 9394/96) mostra uma tendência de mudança no modelo de curso superior, privilegiando o papel e a importância do estudante no processo de aprendizagem, em que o papel do professor de "ensinar conceitos e soluções", passe a ser "ensinar o estudante a aprender conceitos e soluções". Nessas novas normas aplicáveis também às ciências Quími-cas, há necessidade de compreender seus conceitos, leis e princípi-os; conhecer as propriedades físicas e químicas principais dos elementos e compostos, que possibilitem entender e prever seu comportamento físico-químico, aspectos da reatividade, mecanismos e estabilidade; acompanhar e compreender os avanços científico-tecnológicos e educacionais e reconhecer a Química compreendendo os aspectos históricos de sua produção e suas relações com os contextos cultural, sócio-econômico e político 1,2 .Desenvolvendo-se e aplicando-se metodologias de ensino variadas, utilizando-se laboratórios ou mesmo a sala de aula com experimentos demonstrativos relacionados à Química do cotidiano, contribui-se para o desenvolvimento intelectual dos estudantes e despertase o interesse científico em adolescentes que poderão vir a ser futuros pesquisadores.No ensino do conceito de mecanismos de reações de oxidação-redução, muitas vezes não se tem a preocupação em associar os conteúdos das disciplinas do ensino em geral com fenômenos que podemos observar no cotidiano, muitas vezes esclarecedores, como o escurecimento de frutos e vegetais e a sua maior preservação na presença de algumas substâncias ou de determinadas condições de armazenagem.Por outro lado, a indústria de alimentos apresenta como uma das principais preocupações, a preservação dos produtos que comercializa, buscando metodologias para manter o sabor, a aparência, o valor nutritivo e prevenir a formação de compostos tóxicos em alimentos in natura ou que serão processados. A ...

show abstract

“…It was found that this method of feature identification is applicable to other types of produce with uniform skin colour. This technique was improved by Yang and Marchant [95], who applied a "snake" algorithm to closely surround the defects. To discriminate russet in "Golden Delicious" apples a global approach was used and the mean hue on the apples was computed [20].…”

Section: Leemansmentioning

confidence: 99%

Quality Inspection and Grading of Agricultural and Food Products by Computer Vision-a Review

Narendra¹,

Hareesh²

2010

IJCA

View full text Add to dashboard Cite

The paper presents the recent development and application of image analysis and computer vision system in quality evaluation of products in the field of agricultural and food. It is very much essential to through light on basic concepts and technologies associated with computer vision system, a tool used in image analysis and automated sorting and grading is highlighted.In India the ever-increasing population, losses in handling and processing and the increased expectation of food products of high quality and safety standards, there is a need for the growth of accurate, fast and objective quality determination of food and agricultural products. Computer vision is a rapid, economic, consistent and objective inspection technique, which has expanded into many diverse industries. Its speed and accuracy satisfy everincreasing production and quality requirements, hence aiding in the development of totally automated processes. This non-destructive method of inspection has found applications in the agricultural and food industry, including the inspection of quality and grading of fruit and vegetable. It has also been used successfully in the analysis of grain characteristics and in the evaluation of foods such as potato chips, meats, cheese and pizza. This paper reviews the progress of computer vision in the agricultural and food field then explores different possible areas of research having a wider scope to enhance the existing algorithms to meet the today"s challenges.

show abstract

Accurate blemish detection with active contour models

Cited by 29 publications

References 6 publications

A real-time grading method of apples based on features extracted from defects

A real-time grading method of apples based on features extracted from defects

Análise de imagem em química analítica: empregando metodologias simples e didáticas para entender e prevenir o escurecimento de tecidos vegetais

Quality Inspection and Grading of Agricultural and Food Products by Computer Vision-a Review

Contact Info

Product

Resources

About