This 23 page tutorial examines the use of grayscale channel luminosity to control tonal values in color images. The basic approach is to utilize the individual RGB channels as sources for luminosity blending into the full color image - applying B+W tonality to a color image.

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Detailed step-by-step instructions are given for

Layer apply modes

Advanced blending options

Layer Sets

Apply Image command

Hue/Saturation adjustments

None of the corrections above used curve or levels adjustments and, in fact they would be impossible to do using standard contrast enhancing techniques. Once you discover the power of luminosity blending you will discover numerous uses for it in your own work.

A link for all three sample files is contained in the PDF – 23 pages 5.6 MB download

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Special Downloading Note: You must click this link to get to the "Download" page. This page gives you the link to download the file – you can bookmark the page to return to it later but it is best to click the download link and download the file right away. There are instructions on the download page for saving the PDF to your hard drive and a link for Windows users to get "Stuffit Expander" to decompress sample files.