| 摘要 |
<p>PROBLEM TO BE SOLVED: To display the source video signals having a wide dynamic range at the display device having a low dynamic range with excellent contrast by extracting high frequency components by removing low frequency components from the source video signals and turning signals for which the low frequency components to which the prescribed weighting less than one is performed are added to the high frequency components to display signals. SOLUTION: A processor 38 computes the low frequency components LF, the high frequency components HF generated by removing the low frequency components LF, the conversion function IHS of the counted value of the frequency of a histogram and the conversion display signals DHF of the high frequency components HF converted by the conversion function IHS from the source video signals S from a camera 31 stored in a memory 32 and stores them in the memory 34. Then, the conversion display signals DHF and the low frequency components LF weighted by a coefficientβare added and the display signals DP are generated and stored in the memory 33. Thus, the high frequency components HF are emphasized and video images with the improved contrast are displayed at the display device 37.</p> |
