| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a periphery of an original image from being eliminated by shifting an enlarged/reduced image in an obliquly inside direction with respect to the original image when the image is enlarged or reduced by interpolation processing. <P>SOLUTION: When a range obtained by adding virtual pixels for k clocks to the outside of effective pixels of the original image is used for processing, representative values are calculated for each pixel block consisting of mutually adjacent 2×2 pixels in the processing range. By applying interpolation operation to the calculated representative values, a pixel value of each pixel at an interpolation position according to a predetermined scaling factor is determined. The effective range 22 of the image constituted by the representative values is widely shifted outside the effective range 21 of the original image, and the interpolation operation is applied to the representative values whose effective range is shifted to the outside. Even if the effective range of the image constituted by the interpolation values is shifted to the inside, the same result is obtained as the effective range of the original image. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
