Channels
Each curve consists of three channels: red, green, and blue. When you
change one channel, the whole curve moves in response.
For example, if you change only the red brightness value, then expose
another test image, you see changes to the measured densities for all
three colors.
Figure 6 3 Test image 1, Gray Scale
Left, as it appears on slide film or on a print from a negative.
Right, as it appears on a negative
The numbering sequence begins at the top left and ends at the bottom right
6-4 • PCR II Plus User Guide
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