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SCANNING FROM WINDOWS 98, ME, 2000, OR XP 39
HIGHLIGHT/SHADOW LEVELS
Images have light and dark areas. The highlight is the lightest spot on an
image; shadow is the darkest spot. The range of colors between the
highlight and shadow determines the range of colors of the image. Use
the Highlight/Shadow Levels to extend the original range of colors
between the highlight and shadow to reveal more details in the
midrange colors.
To adjust the highlight and shadow levels:
1. Click the Highlight/Shadow button.
The dialog box shows a histogram of the saturation, gamma, and
hue (S, G, H) of the range of colors for the highlight and shadow.
Saturation is the strength or purity of a color, gamma controls the
brightness of the midtones of the color, and hue is the color your
eyes see as reflected from the image. The gamma setting in this
dialog box is in conjunction with the hue and saturation but you
can also set gamma by itself for an image. See the section “Curves,”
below for more information
2. From the Channel drop-down list, choose RGB to adjust all the
channels together, or choose a single channel if available.
3. Enter new settings in the boxes for the three levels, or drag the
small triangles at the bottom of the histogram.
The histogram changes to show the new levels.