The difference between the output of a k-signal nonlinear low-pass filter (8g) and the output of an h-signal nonlinear low-pass filter (8r) is added (44) to the value of the h-th pixel signal (h(i, j)) at the pixel position of interest to obtain the k-th pixel signal (k(i, j)) at the pixel position of...http://www.google.com/patents/US7643074?utm_source=gb-gplus-sharePatent US7643074 - Pixel signal processing apparatus and pixel signal processing method
Pixel signal processing apparatus and pixel signal processing method