Patent Number: 6,480,622

Title: Image processing method for eliminating color shifts generated in contour region in image obtained from image input apparatus

Abstract: An image processing method includes the steps of converting an image obtained from an image input apparatus into an L.multidot.a.multidot.b image (where L represents the gray scale axis, or luminance, and a and b represent two orthogonal axes that together define the color and saturation), obtaining a chroma image by using chroma processing to process a and b values which are chrominance-signal values in the pixels of the a and b images as saturation images, obtaining a binary image by binarizing the pixels of the chroma image, extracting the contour of the binary image, and extracting a region in which achromatization is performed by widening the extracted contour of the extracted image.

Inventors: Kim; Talguk (Iwate-ken, JP)

Assignee: Alps Electric Co., Ltd.

International Classification: G06T 5/00 (20060101); H04N 1/58 (20060101); H04N 1/56 (20060101); G06K 009/00 (); G03F 003/08 (); H04N 001/387 ()

Expiration Date: 11/12/2019