Image processing method, image processing apparatus and image processing program
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United States of America Patent
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Issued Date -
Oct 21, 2004
app pub date -
Apr 6, 2004
filing date -
Apr 15, 2003
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Abstract
There is described a method for processing an input image, so as to output a processed image. The method includes the steps of: deriving image characteristic information of a predetermined area, which includes adjacent pixels and is located in a vicinity of an image-processing object pixel other than the adjacent pixels, from information of the adjacent pixels residing in the predetermined area, both the adjacent pixels and the image-processing object pixel being included in the input image; and applying a sharpness-enhancement processing to the image-processing object pixel, based on the image characteristic information. The image characteristic information includes at least one of a sum of differential signal absolute-values between the adjacent pixels residing in the predetermined area, a variance of each signal value of the adjacent pixels residing in the predetermined area and a standard deviation of each signal value of the adjacent pixels residing in the predetermined area.
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