## Effective Chromatic Noise Reduction (Noiseware-like)

1. transform RGB image to luminance-split color space.
2. smooth the non-luminance channels (may use bilateral filtering), NOTE that the smooth window size must be large enough (eg. 21x21 pixels).
3. well-blended with original channels if we don't want to lose too much color especially in small object region.
4. inverse transform colorspace.
5. Done.

sample source