| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce low-frequency noises while avoiding trouble such as the lowering of resolution. <P>SOLUTION: Replacement data are generated from reduced images. The replacement data generated are compared with input pixel data. When the difference between the replacement data and the input pixel data is not greater than a predetermined value, the input pixel data are replaced by the replacement data, whereby replacement can be achieved to high precision. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
