I have not seen any messages that discuss my favorite technique for conversion to B&W. It uses a little-known PS feature called Split channels. Split Channels is a menu option on the flyout menu for the Channels Palette. It takes your RGB image and creates a separate grayscale image for each channel. Almost everyone here will be familiar with using Mode | Grayscale or Channel Mixer with the Monochrome box selected to create a B&W image. This is even better than using Channel Mixer with Monochrome. Much better, IMHO! After you create files for the separate channels, you copy them all to the same document as separate layers. That way, you get immediate feedback as you experiment with various layers options, like opacity. I worked on an image last night I brought the blue channel in at 5 percent opacity in Normal blend. The red channel was 80% opacity in Normal blend. The green channel was 95% opacity, but I used Soft Light blend for added contrast. You can turn the visibility on and off for various layers as you try to decided how much of each to incorporate. You can change the layer opacity and blend mode. You can even control the set points for what gets blended from each channel -- perhaps the shadows from one, the midtones and highlights from another. I'm working on a PDF tutorial right now. It's now the only way I convert from color to B&W. Give it a try! Pretty neat stuff! Perhaps the Split Channel technique will come in handy for you in the future. Cheers, Mitch
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Converting to B&W with Split Channel
2003-12-04 by Glenn Mitchell
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