Hi David! On Wed, Apr 13, 2011 at 17:47, David Vincent-Jones <[email protected]>wrote:
> I am finding that sharpening of my monochrome images appears to create > fairly heavy noise, even when done in moderation. I have tried the > 'denoise' feature and find it makes little or no change. > The "denoise" also functions as a noise floor for the sharpening algorithm, so in general you should try to Secondly, when doing BW, you can sometimes reduce noise by eliminating a channel that is "stretched" due to white balance, so if you have low WB temperature, eliminate the blue and if you have a medium to high, eliminate the red. I just did a few tests on high contrast, high ISO BW images, and I can see your issue, since color noise is converted to luma noise. I will do a few tests, but it seems like it could be a solution to heighten the maximum value for denoise, to 150 for instance. I don't want to set it too high, since we begin to get artifacts in some cases. > In part this may occur since I tend to manipulate the tone curve fairly > extensively with monochrome. > > As I understand it sharpening needs to be applied subsequent to all > other functions ... does the program know that? > Yes - sharpen/denoise is the last function to be applied in the chain. Is anyone out there also finding this same situation and is there a > solution? > > David > Best regards, Klaus
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