You can create your own special-effect and image-correcting filters using the Custom command. You can also save custom filters and use them in future Canvas X Draw documents.
Filters work with an image one pixel at a time. Using a mathematical formula and the color values of pixels within a specified radius, filters assign each pixel a new color value. In a custom filter, you supply the numbers the filter uses to calculate the new color values.
The same filter can produce different effects in other images. To get the most out of custom filters, spend time experimenting.
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| Original | |
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| Blurred image | Custom filter |
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| Embossed image | Custom filter |
Grid entries | Sum | Scale |
2 2 1 -1 -1 3 | 2+2+1-1-1+3=6 | 6 |
-1574-328 | -15+7+4-3+2+8=3 | 3 |
In the Custom dialog box, enter the filter settings and click Save. Enter a name and location for the filter and click Save.
In the Custom dialog box, click Load. In the directory dialog box, select the filter file and click Open.