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D
IMAGE SCAN DUAL III UTILITY
A short guide to tone curve corrections
Image processing is a highly specialized and difficult field that takes years of practice to master.
This basic guide to using tone curves covers a few simple procedures to improve your pictures.
For more about digital-image processing, consult your local book dealer about self-help guides on
this subject.
Bringing out detail in the shadows
With the RGB channel selected, place the smooth-curve
cursor on the center of the curve. Click and drag the curve
up. Look at the displayed image to judge the result. The
adjustment can be very small and still have a significant
impact on the image. Moving the tone curve down will
make the image darker.
74
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IMAGE PROCESSING
This is a simple technique to make a subject hidden in
the shadows brighter. Unlike the brightness level control
(p. 70), this method of correction will not loose details in
the highlight areas of the image.
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