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Chapter 13: Using Filters
ilters let you apply special effects to your
images, such as impressionistic or mosaic
effects, lighting effects, and distortions. You
can also create your own effects using the Custom
filter or the Filter Factory (included on the Adobe
Photoshop CD-ROM).
For detailed information on individual
filters and a gallery of examples, see
online help.
Adobe Photoshop also supports plug-in filters
developed by non-Adobe software developers.
Once installed, plug-in filters appear at the bottom
of the Filter menu and work the same as built-in
filters.
If you are interested in creating Photoshop-
compatible plug-in modules, contact Adobe
Systems Developer Support. (See “Using plug-in
modules” on page 36.)
Note: If you have problems or questions about third-
party plug-ins, contact the plug-in’s manufacturer
for support.
Previewing and applying filters
To use a filter, choose the appropriate submenu
command from the Filter menu. These guidelines
can help you in choosing filters:
•
The last filter chosen appears at the top of
the menu.
•
Filters are applied to the active, visible layer.
•
Filters cannot be applied to Bitmap-mode,
indexed-color, or 16-bit per channel images.
•
Some filters only work on RGB images.
•
Some filters are processed entirely in RAM.
•
Applying filters—especially to large images—
can be time-consuming. Previewing effects can
save time and prevent unintended results.
Depending on the filter, you may have a preview
window or the option to preview effects on the
entire layer.
To save time when trying various filters,
experiment on a small, representative part
of your image or a low-resolution copy.
To preview and apply a filter:
1
To apply a filter to an area of a layer, select that
area. To apply a filter to the entire layer, leave the
image unselected.
2 Choose a filter from the submenus in the
Filter menu. If a filter name is followed by ellipses
(…), a dialog box appears.
3 If a dialog box appears, enter values or select
options.
4 If the dialog box contains a preview window, use
the following navigation methods to preview the
effect:
•
Click in the image window to center a specific
area of the image in the preview window.
Note: This does not work with all preview windows.
F