User Guide

Using Image Effects272
Equalize
The Equalize effect improves
contrast, adjusting black and white
points and distributing the brightness
levels throughout the entire range of
available levels.
Before and after Equalize.
Corel Painter lets you equalize an
image by creating a histogram
showing the number of pixels for each
brightness level value and then
allowing you to adjust those values.
Equalize also allows gamma
adjustment, which lightens or darkens
an image without changing highlights
or shadows.
The histogram is represented by the silhouette.
Each peak shows the number of pixels for a
brightness level. You can adjust white and
black points by dragging the triangles.
To equalize colors:
1 Select a layer or area of the canvas.
If you want to apply the effect to
the entire image, make sure there
are no selections.
2 Choose Effects menu > Tonal
Control > Equalize.
Corel Painter automatically adjusts
the image or selection so that the
lightest color is white and the
darkest color is black.
3 In the Equalize dialog box, adjust
contrast by dragging the black and
white markers under the
histogram.
Any values in the image located to
the right of the white marker
become white; any values to the
left of the black marker become
black.
4 Adjust the gamma by doing one of
the following:
• Move the Brightness slider to
the right to increase gamma,
making the image darker.
• Move the Brightness slider to
the left to decrease gamma,
making the image lighter.
Changing the gamma adjusts only
the midtones of an image and
leaves the black and white areas
untouched.
5 Click OK to apply changes.
A preview of the changes is applied
to the original image, but is not
final until you click OK. If you
want to revert to the original
image, click Cancel.
Tip
•
If you made a selection and you want
to equalize the entire image, enable Apply
to Entire Image in the Equalize dialog
box.