| 摘要 |
A video processing section (19) of the present invention is a gradation adjustment device for correcting a gradation of an image to be displayed on a television receiver (10). The video processing section (19) includes, a gradation correcting section (2), an intermediate brightness region determining section (3), a brightness difference determining section (4a), a brightness difference threshold determining section (4b), and a gradation adjusting section (5). The video processing section (19) corrects brightnesses of adjacent pixels, which brightnesses are included in an intermediate brightness region of brightness distribution, so as to reduce a first brightness difference between the adjacent pixels, which first brightness difference is obtained in a case where gain is applied to input image data, [1] the first brightness difference being greater than a second brightness difference between the adjacent pixels, which second brightness difference is obtained in a case where gain is not applied to the input image data, and [2] the first brightness difference being not more than a predetermined threshold. This makes it possible to provide a gradation adjustment device for realizing an image displaying device that keeps an excellent quality of an original image. |
