| 摘要 |
<p>To obtain a satisfactory gradation correction result, even for a section where haze occurs, in an image during gradation correction in the image, such as a picked-up image. ! An epsi-filter 107 extracts a broad luminance component (Y_low) from a luminance component (Y) of an image to be processed. A contrast component generating section 108 subtracts the broad-luminance component (Y_low) from the luminance component (Y) and generates a contrast component (Y_high) for haze elimination, corresponding to a high-frequency component of the image to be processed. A contrast-component adjusting section 109 obtains a haze degree (degree of haze) in the image to be processed, on the basis of distribution area information (RGBmax and RGBmin) of the luminance of the image to be processed, and adjusts the contrast component (Y_high) for haze elimination, according to the obtained haze degree. By having A luminance correcting section 110 corrects the gradation of the image to be processed, and adding the adjusted contrast component (Y'_high) to the luminance component (Y) of the image to be processed. Gradation correction which is optimal for haze elimination in the image to be processing can be performed. ! (C)2011,JPO&INPIT</p> |
