Creating a custom special effect filter (Convolution effect)
You can use the Convolution filter to create your own special effects. You can apply your custom made effect to your image and save your options as a preset for future use.
To create a custom effect filter:
- In Edit mode, in the Add group, click Special Effect.
- Click Convolution.
- On the User Defined Convolution tab, set the options as described below.
- Do one of the following:
- Click Done to accept your changes and close the pane.
- Click Cancel to discard your changes and close the pane.
User Defined Convolution options
|
Convolution matrix |
Specifies the formula to use when altering the image. Type numbers in the matrix fields to change the pixels in the image. Using a mathematical formula, the color value of each pixel in an image is multiplied by the numbers in the matrix to produce an effect. |
|
Division factor |
Specifies the fractional coefficient of the matrix. Type a number into the Division factor field to use fractional coefficients in the matrix. The product of the convolution matrix is divided by the division factor before being applied to a pixel. |
|
Bias |
Specifies the brightness of the image. Type a number into the Bias field to change the brightness of the image. The bias number is added to the RGB values of each pixel. A positive number brightens the image, while a negative number darkens the image. |
|
Clear matrix |
Resets the matrix. |
|
Sample filters |
Loads a sample effect to use as a starting point for creating your own effect. |
See also: