Changing color and contrast
You can use the Invert, Desaturate, and Brightness/Contrast com-
mands to create special effects and correct lightness levels in images.
These commands apply changes equally to all color values.
If you select an area of an image, Canvas applies the command to that
area only. Otherwise, Canvas applies the command to the entire
image in a paint object.
Inverting colors in images
You can use the Invert command to reverse the colors in an image, as
in a photographic negative. The command converts each pixels color
to its opposite hue in the color spectrum. It does this by inverting the
brightness value of each pixel in each color channel.
For example, if a pixel is pure red, its brightness levels are 255, 0, 0
in RGB mode. When inverted, this pixels brightness values become
0, 255, 255, changing it to pure blue-green, its opposite in hue.
The Invert command can be particularly useful in channel editing, as
colored pixels can denote either masked or selected areas.
To invert an image
1
Select one or more paint objects to invert all the images. You
can select an area in one image in edit mode to invert the selected
area only. If you dont make a selection, the entire image in edit
mode is affected.
2
Choose Image > Adjust > Invert.
Desaturating image colors
You can use the Desaturate command to remove color from images
completely, while retaining the relative brightness levels of shadows,
Original RGB
Inverted RGB
Inverted Green
channel
Green channel
selected
Tip
You cant use the Invert
command on images in
Indexed mode.