To use the Minimum and Maximum 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 don’t make a selection, the entire image in edit mode is affected. This command doesn’t work with paint objects in Black & White mode, and Indexed mode. 2 To maximize the light areas in an image, choose Image > Filter > Other > Maximum and enter a radius from 1 to 16 pixels. 3 To minimize the light areas in an image, choose Image > Filter > Other > Minimum and enter a radius from 1 to 16 pixels. 4 Turn on Preview to check the settings and then click OK. Filling selections with color The Image > Filter > Other > Fill command lets you quickly and uni- formly fill a selection with the foreground or background color, black, white, or gray. In addition, you can select an opacity level and transfer mode for application of the color. To fill a selection with a color 1 With an area of an image selected, choose Image > Filter > Other > Fill. The Fill dialog box opens. 2 In the Use pop-up menu, choose a fill option. To make the color appear transparent, set the Opacity level to less than 100%. To use a mode effect, choose an option in the Mode pop-up menu. 3 Click OK to fill the selection. Creating custom image filters 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 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, fil- ters assign each pixel a new color value. In a custom filter, you sup- ply 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.
Canvas 8 Help: Image filters and effects (16 of 20)                                                 Page #722