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Quote:Looks good but what is the difference between doinga Gaussian Blur in RGB & in LAB colour?
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Quote:Quote:Looks good but what is the difference between doinga Gaussian Blur in RGB & in LAB colour? By switching to LAB mode and doing the gaussian blur on just the A channel and the B channel, you effectively reduce the chrominance noise by blurring it. Because you're not applying the blur to the L-Luminance channel, there is no loss in sharpness of the image.Mike
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Quote:You can also boost your color using the a and b channel only
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Quote:Thanks Mike,Wouldn't the same result be achieved by applying noise reduction to the color layer in lrgb? Cheers,Harel
Quote:Quote:Thanks Mike,Wouldn't the same result be achieved by applying noise reduction to the color layer in lrgb? Cheers,Harel I would think so yes.In this case all I had was an RGB image (actually a bicolor from Ha and Oiii and a synthetic G). I had no luminance only as it were.I could have created one from the R(G)B, but it would have inherited the noise from the R(G)B image.I did try treating the Ha as luminance but I did not care for the results with only a bicolor.