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Chapter 5: Edit mode

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:

1. In Edit mode, in the Add group, click Special Effect.

2. Click Convolution.

3. On the User Defined Convolution tab, set the options as described below.

4. 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.

Geometry tools

Rotating an image

You can rotate an image at preset or custom angles in Edit. You can save the rotation settings as a preset for future use.

To rotate an image at a custom angle:

1. In Edit mode, in the Geometry group, click Rotate.

2. Select one or more of the following:

Select one of the default orientation options.

Drag the Straightening slider to the left or right until the image appears straightened.

Click the Horizontal or Vertical button, and use the tools as described below.

Select Crop straightened image if you want to crop the image after it is straightened.

Select Preserve straightened image if you do not want to crop the straightened image. Select the color that you would

like to display behind the straightened image from the Fill color drop-down.

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ACD Systems ACDSee 14 Guía de usuario Pagina 175