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An Approach to Edge Detection in Images of Skin Lesions by Chan-Vese Model
Roberta B. Oliveira; João Manuel R. S. Tavares; Norian Marranghello; Aledir S. PereiraNowadays there is a great interest in the application of computational systems for the analysis of skin lesions. These systems allow the dermatologist to prevent the development of malignant lesions. The development of the systems has occurred due to the increase of skin cancer cases. In the characterization of skin lesions it is necessary to segment the images accurately. Thus the features and edges informatio...
Identification of Foliar Diseases in Cotton Crop
Alexandre A. Bernardes; Jonathan G. Rogeri; Roberta B. Oliveira; Norian Marranghello; Aledir S. Pereira; Alex F. Araujo; João Manuel R.S. TavaresThe manifestation of pathogens in plantations is the most important cause of losses in several crops. These usually represent less income to the farmers due to the lower product quality as well as higher prices to the consumer due to the smaller offering of goods. The sooner the disease is identified the sooner one can control it through the use of agrochemicals, avoiding great damages to the plantation. This c...
Classificação de Assimetria em Lesões de Pele por meio de Imagens usando Máquin...
Roberta B. Oliveira; Carlos R. D. Caldas Júnior; Rodrigo C. Guido; Norian Marranghello; Aledir S. Pereira; Alex F. de Araujo; João Manuel R. S. TavaresThe increased occurrence of cancer cases over the years and the importance of prevention work motivated the development of this work. It aim is help the dermatologist in the diagnosis of skin lesions, providing information about the characteristics of asymmetry of ABCD rule (Asymmetry, Edge, Color and Diameter), widely used in the initial examination to determine if a lesion is malignant or no. To do so, are ex...
Caracterização de Textura em Imagens de Lesões de Pele por Máquina de Vetor de ...
Roberta B. Oliveira; Carlos Roberto D. Caldas Júnior; Aledir S. Pereira; Rodrigo C. Guido; Alex F. de Araujo; João Manuel R. S.TavaresDue to the increased incidence of skin cancer, computational methods using intelligent systems have been developed to aid dermatologists in the diagnosis of skin lesions. This paper proposes a method to classify the texture, considering that it is an important feature in identification of lesions. For this is defined a feature vector with the fractal dimension of images through the box-counting method (BCM), wh...
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