Processamento digital de fotografias a curta distância, na diferenciação quantitativa de manchas de pele

• Autor(a) principal: Antoniazzi, Rodrigo Luiz
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Manancial - Repositório Digital da UFSM
• dARK ID: ark:/26339/001300000zmt0
• Texto Completo: http://repositorio.ufsm.br/handle/1/9541
• topic: Câncer de pele; Dimensão fractal; Índice de variação de cores; Índice de compacidade; Primeira excentricidade da elipse; Fotointerpretação digital; Skin cancer; Dimension fractal; Index of variation of colors; Index of compactness; First idiosyncrasy of the ellipse; Digital photointerpretation; CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS

The skin cancer is the abnormal and uncontrolled growth of the cells that compose the skin, disposing in formats different from borders, colors, sizes and symmetry creating different types. In general lines, the forms of the stains are geometrically irregular. As many forms in the nature cannot be explained in the molds of the conventional geometry, scientists developed the geometry fractal to classify certain objects that don't possess dimension whole, but fractional. The dimension fractal can characterize group or object, for the first it is the number that informs us how densely the group it occupies the metric space where he meets and for the second, the irregularity of your contour. The illustrations can be also differentiated through the index of compactness, in the index of variation of colors and your way through the first idiosyncrasy of the ellipse. This group of parameters was applied for the differentiation of skin stains. In this work grew a software to esteem the dimension fractal of skin stains (benign and malignant) using the called method Box Counting for the estimate of the dimension fractal, the index of variation of colors to quantify the number of colors of the stain, the index of compactness to evaluate the existent relationship between the area of the illustration and the area of the circle with same perimeter of the illustration and the first idiosyncrasy of the ellipse for comparison with a circumference. The parameter that allowed to differentiate the skin stains was the dimension fractal.