Image processing method for eliminating color shifts generated in contour region in image obtained from image input apparatus
AssigneeAlps Electric Co., Ltd.
InventorTalguk Kim
Life of this patent
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Abstract
An image processing method includes the steps of converting an image obtained from an image input apparatus into an L·a·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.
Claims5
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 L·a·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 L·a·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 L·a·b image into an RGB output image.
Dependencies are inferred from the claim text.