| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image processing device and an image processing program making gradation correction by grading even a flat area in an image where gradation is crushed. <P>SOLUTION: An image gradation creation part 11 causes a flat image or an image area with little variation in gradation to be varied in gradation by, for example, smoothing processing with respect to an input color image, and creates new gradation to make the color image a gradation-created image. A color distribution analysis part 12 creates a gray level histogram of the gradation-created image whose gradation has been newly created by the image gradation creation part 11, and analyzes the histogram so as to create a color gradation curve for performing gradation correction. A color gradation conversion part 13 performs gradation conversion using the color gradation curve created by the color distribution analysis part 12 with respect to the gradation-created image created by the image gradation part 11. Thus, the gradation of the flat color area in the input color image where the gradation is crushed is reproduced. <P>COPYRIGHT: (C)2009,JPO&INPIT |
