Patent ID: 6480622
Filing Date: 2002-11-12
Classification: G06T,H04N

Abstract:
An image processing method for eliminating color shifts generated in a contour region in an image obtained from an image input apparatus,said image processing method comprising the steps of: converting the RGB image obtained from said image input apparatus into an LÂ·aÂ·b image where L represents the gray scale axis, namely, luminance, and a and b represent two orthogonal axes that together define the color and saturation; using chroma conversion processing for converting the a and b values which are chrominance-signal values in the pixels of the a and b images obtained by decomposing the LÂ·aÂ·b image into the chroma image; obtaining a binary image by binarizing the pixels of the chroma image; extracting a contour of the binary image; widening the extracted contour; performing achromatization in the widened contour; and after performing said achromatization, converting the LÂ·aÂ·b image into an RGB output image.