To use Custom filters
1
Select one or more paint objects to adjust all the images. You
can select an area in one image in edit mode to adjust the selected
area only. If you dont make a selection, the entire image in edit
mode is affected. This command doesnt work with paint objects in
Black & White mode, and Indexed mode.
2
Choose Image > Filter > Other > Custom. In the Custom dialog
box, type values from -999 to 999 in the boxes in the grid. Canvas
ignores blank boxes.
3
Enter a Scale value from 1 to 9,999. To retain the general
appearance of the original image, the scale should equal the sum of
the entries in the configuration grid. For example:
4
Enter an Offset value from -9,999 to 9,999. Positive values
increase the brightness of the final outcome while negative values
decrease the brightness.
Grid entries
Sum
Scale
2 2 1 -1 -1 3
2+2+1-1-1+3=6
6
-15 7 4 -3 2 8
-15+7+4-3+2+8=3
3
Custom filter
Blurred image
Custom filter
Embossed
image
Original
These boxes represent the pixels
surrounding a target pixel
This box represents the
target pixel in an image