An interesting thing happened to me while I was working my way through the image sharpening for Blurb, I learned more about noise reduction. huh?
Okay, I have to admit, up to now, I just accepted noise in my digital images. I could easily see the noise in the skyes of my toned images for In Passing. And I did not realize the amount of noise in my scanned images, but since my workflow until recently was now fully digital, I did not worry about the scanned film. Ah, ignorance is bliss;- )
So now while I was trying to get the best book printed image and working through the issues of sharpening, I have realized the issues with noise and of course the need for noise reduction. And for most of you, I image you wonder what planet I have been on for the last couple of years, eh?
So I have been talking and working on some noise reduction routines to see if it makes a difference. And as you might guess, it does for some images a lot more than others. And it seeems to make more of a difference for my digital images from my XTi (10.2Mp) than it does from my scanned 120 film images.
So I do expect to try out Noise Nija shortly, but I have found that creating a duplicate layer in Photoshop and then going to the channel mixer, running a despeckle filter on each color channel to help a lot, sometimes running it twice on the blue channel, which is usually recognized as the “noisey” channel.
I don’t think that this is significant to the sharpening book, but I do see that I want to review most of my In Passing photographs and implement some noise reduction on them. Ah, always something to improve my work…
Best regards, Doug
Oh, and with a noise reduction on an phototgraph, I realize that it will probably require a little more sharpening action on the baseline file, as most noise reduction processes also soften the image. Which is why I am extremly happy that my sharpening action is on a seperate adjustment layer that can be easily pitched and replaced with a new adjustment layer;- )