Resumo

VALENCIA DIAZ, Edison. DESCRIPCIÓN DEL MÉTODO LOG-VISION DE PROCESAMIENTO DE IMÁGENES EN COLOR EN APLICACIONES A IMÁGENES OFTÁLMICAS. Rev. ing. biomed. [online]. 2007, vol.1, n.2, pp.74-78. ISSN 1909-9762.

This paper describes an algorithm to sharpen a colour digital image based on S-CIELAB extension. S-CIELAB involves a series of smoothing spatial filters in the opponent color space to approximate the contrast sensitivity functions of the human vision system. The filters are linear combinations of Gaussian masks. The algorithm combines these spatial filters with the Laplacian operator in each opponent channel to obtain the sharpened image. The resulting image is then subtracted from the original image in each opponent channel and back transformed to the device independent representation space (XYZ) to obtain the final sharpened image. This article describes two examples that use the sharpening algorithm with medical images of the ophthalmic area.

Palavras-chave : Color appearance; Medical image; Image enhancement; Physiological optics; Image processing; Color image sharpening; Human vision system; Color vision.

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