An image signal processor detects deficient pixels, such as pixels having a white deficiency or a black deficiency, and corrects the image signal so that the pixel deficiency is not reproduced. A memory circuit holds a target pixel signal and peripheral signals, which correspond to the pixels adjacent...http://www.google.de/patents/US6768513?utm_source=gb-gplus-sharePatent US6768513 - Deficient pixel detection method and image signal processor
