First off, thank you to Richard for a great book. I've recently started working thru it diligently, and know the concepts learned and tools are going to greatly improve my photos. To now, my post-processing attempts have all been "seat of the pants."
I know this is basic, but I'm a little confused on understanding the meaning behind RGB and Luminosity separations. I think a clearer understanding of these will help me better grasp the other concepts in the book.
1) In an RGB channel, do the various tone levels represent the brightness (luminosity) of the channel pixels? Taking the red channel, for example, If you have full tonal range, does this equate to 0=black (0% red light reflected) and 255=full red (100% of red light reflected)?
2) What do the tones in the Luminosity separation actually represent? Is it basically a brightness representation of the composite of all colors together. I've read page 41 over and over, but I'm still confused. I've had no experience with the Lab color model.
Hope my questions are clear. Thank you for the help.
Marsh
I know this is basic, but I'm a little confused on understanding the meaning behind RGB and Luminosity separations. I think a clearer understanding of these will help me better grasp the other concepts in the book.
1) In an RGB channel, do the various tone levels represent the brightness (luminosity) of the channel pixels? Taking the red channel, for example, If you have full tonal range, does this equate to 0=black (0% red light reflected) and 255=full red (100% of red light reflected)?
2) What do the tones in the Luminosity separation actually represent? Is it basically a brightness representation of the composite of all colors together. I've read page 41 over and over, but I'm still confused. I've had no experience with the Lab color model.
Hope my questions are clear. Thank you for the help.
Marsh
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