Method and system for cleaning images to highlight information recorded on a background surface
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United States of America Patent
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N/A
Issued Date -
Aug 21, 2003
app pub date -
Feb 20, 2002
filing date -
Feb 19, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of cleaning an image of a background surface on which information has been recorded includes for each pixel p.sub.ij in the image, creating an array holding grayscale values of neighbor pixels within a region surrounding the pixel p.sub.ij. The average grayscale value of the neighbor pixels is calculated and then thresholded. The grayscale value of the pixel p.sub.ij is compared with the thresholded average grayscale value. If the grayscale value of the pixel p.sub.ij is darker than the thresholded average grayscale value, the pixel is retained. Otherwise, the pixel value is set to bright. For each retained pixel, the colour value of the pixel p.sub.ij and an average colour value are used to determine the output colour of the retained pixel in the cleaned image.
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Cited Art Landscape
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