| 摘要 |
PROBLEM TO BE SOLVED: To decide gamma correction from a complicated distribution histogram in real time without expanding the scale of a hardware by providing a matrix part, histogram extraction part, histogram integration part, integration look-up table(LUT) and gamma decision part as specified ones respectively. SOLUTION: A matrix part 60 receives the R, G and B signals of an image signal and outputs luminance signals. While using the luminance signals outputted from the matrix part 60, a histogram extraction part 62 extracts the distribution histogram of luminance signals. While using the histogram outputted from the histogram extraction part 62, a histogram integration part 64 integrates it. While using the output of the histogram integration part 64, an integration LUT 66 corrects the inputted image signal into an image suitable for a current image. A gamma decision part 68 decides the gamma from the integration LUT 66 and outputs the corrected image. |
