Image processing apparatus, image processing method, and computer product
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United States of America Patent
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Nov 15, 2011
Grant Date -
Mar 27, 2008
app pub date -
Sep 24, 2007
filing date -
Sep 26, 2006
priority date (Note) -
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Abstract
An image processing apparatus includes a contour extraction unit and a contour correcting unit. The contour extraction unit ascertains intensity difference between each of the pixels in the original image data and pixels around the pixel, and evaluates sharpness of a contour to determine intensity of a pixel in the contour image data based on gradient of intensity of the pixel. The contour correcting unit shifts a contour of the pixel in a predetermined direction based on a direction of a slant of the gradient of intensity when an absolute value of the gradient of intensity is larger than threshold.
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