| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform enhancement processing on an image, without generating overshoots or undershoots, even when an input image fully includes a return component on a high-frequency component side, or does not include a high-frequency component. <P>SOLUTION: An intermediate image (D1), for which a specific frequency band component of an input image (DIN) is extracted, and an intermediate image D2, having a frequency component higher than that of the intermediate image (D1) are generated. An intermediate image (D3M) is generated, by amplifying the intermediate image (D1) with a first amplification factor (D3MA); an intermediate image (D3H) is generated by amplifying the intermediate image (D2) with a second amplification factor (D3HA); and an output image (DOUT) is obtained by adding the input image (DIN), the intermediate image (D3M) and the intermediate image (D3H). The first amplification factor (D3MA) is determined, according to pixel values of the input image (DIN) and the intermediate image (D1), and the second amplification factor (D3HA) is determined, according to the pixel values of the input image (DIN) and the intermediate image (D2). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
