Noise Reduction:

RAWHide now features a simple but effective wavelet based Noise Reduction routine that effectively removes "iso-noise" while preserving most real image detail. This code was written by scratch and is not based on any existing code or PhD authored math papers (which I wouldn't be able to understand anyway). Rather, it is based on my "natural" understanding of wavelets. The idea is not to achieve miracles, but rather to get improved results. For miracles I would suggest one of the fancy aftermarket Noise Reduction PhotoShop add-ons. However, As the actual screen shots below reveal, excellent results are possible. Results are applied and tuned via three simple slider controls that control the Strength of the NR effect, the “radius” of the noise frequency to reduce, and a “threshold” of contrast in which not to apply the effect. BTW - By default NR is turned off in RAWHide. 

100% Crop without NR100% Crop with NR
No NRWith NR
LX1 w/no NRLX1 image with NR

200% Crop without NR

No Noise Reduction

200% Crop with NR

With Noise Reduction

© 2008 Franklin A. Holub - All Rights Reserved

Last Updated: 09/05/08 11:54 PM