| 摘要 |
<p>Provided is an image sharpening processing device capable of conducting sharpening processing by varying only luminance without varying a hue. The device is provided with a smoothing means which smoothes the luminance of an input image to obtain a smoothed image, a subtraction means which subtracts the smoothed image from the luminance of the input image to obtain a difference image, a luminance-linked gain calculation means which calculates a luminance-linked gain from the input image, a first multiplication means which multiplies the difference image by the luminance-linked gain to obtain the result of multiplication, an addition means which adds the result of the multiplication to the luminance of the input image to obtain the luminance of an output image, a color-difference gain calculation means which calculates a color-difference gain from the color difference of the input image and the luminance-linked gain, and a second multiplication means which multiplies the color difference of the input image by the color-difference gain to obtain the color difference of the output image.</p> |
