| 摘要 |
A system to minimize the number of comparison and rearrangement operations and increase the processing speed with a small circuit scale utilizing a median filter in the form of hardware. A signal processing apparatus for performing, when a region to be subjected to signal processing has shifted, signal processing of pixel signals in a region to be subjected to signal processing after shifting the region, by utilizing old pixel signals already subjected to signal processing before the shift of the region. The apparatus includes a new-data-order determination circuit for determining an order of magnitude of pixel signals newly added to a region to be subjected signal processing after the shift of the region. A new-data selection circuit rearranges the new pixel signals based on the determined order. An all-data-order determination circuit determines the order of magnitude of all signals by comparing the rearranged new pixel signals with the old pixel signals. An all-data selection circuit rearranges pixel signals in a region to be subjected to signal processing after the shift of the region, based on the determined order of magnitude.
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