A weakly median-filter version means that median filtering only occurs if the pixel is not on an edge in Y, Cr, or Cb space. First, the program creates an edge graph or pixel neighbor graph using a weakly median-filtered version of the YCrCb space. In "Frequently Asked Questions About Color," Charles Poynton reveals that the RGB-to- YCrCb and YCrCb-to- RGB conversion equations used in Adaptive Noise Removal Filter differ significantly from standard ones. However, the program does not transform black-and-white images into another space. Hence, all of the color operations occur in YCrCb space. When the filtering is complete, it then transforms the YCrCb color space into RGB color space. This program first transforms RGB color space into YCrCb color space. The Adaptive Noise Reduction algorithm is a port to Adaptive Noise Removal Filter, a software program. 2 Applying the Adaptive Noise Reduction algorithm.
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