User Guide

Canvas 12 User Guide
To delete a filter:
1. Select the filter in the Edit box.
2. Click the trash can icon.
To save a setting:
1. Define the filters as indicated previously.
2. Click on the menu icon.
3. Select Save settings.
4. In the dialog box, enter a name for the setting.
You can save an unlimited number of settings.
To load a setting:
1. Click on the menu icon.
2. Select Load settings.
3. Choose a setting.
Image Math
This filter performs an arithmetic and logical operation between two color channels and applies the
result to another color channel.
The Operation menu contains the following commands:
Operation Explanation
Add Adds a value to the image. With 8-bit images, results greater than 255
are set to 255.
Subtract Subtracts a value from the image. With 8-bit and 16-bit images, results
less than 0 are set to 0.
Multiply Multiplies the image by the specified real value. With 8-bit images,
results greater than 255 are set to 255. With 16-bit signed images,
results greater than 65,535 are set to 65,535.
Divide Divides the image by the specified real value. Attempts to divide by zero
will be ignored.
Minimum Pixels in the image with a value less than the specified value are replaced
by the value.
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