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336
Adobe Photoshop Help
Applying Filters for Special Effects
Using Help
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Contents
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Index
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336
Texture filters
Use the Texture filters to give an image the appearance of depth or substance, or to add an
organic look.
Craquelure
Paints an image onto a high-relief plaster surface, producing a fine network
of cracks that follow the contours of the image. Use this filter to create an embossing
effect with images that contain a broad range of color or grayscale values.
Grain
Adds texture to an image by simulating different kinds of grain—regular, soft,
sprinkles, clumped, contrasty, enlarged, stippled, horizontal, vertical, and speckle.
Mosaic Tiles
Draws the image as if it were made up of small chips or tiles and adds grout
between the tiles. (In contrast, the Pixelate > Mosaic filter breaks up an image into blocks
of different colored pixels.)
Patchwork
Breaks up an image into squares filled with the predominant color in that area
of the image. The filter randomly reduces or increases the tile depth to replicate the
highlights and shadows.
Stained Glass
Repaints an image as single-colored adjacent cells outlined in the
foreground color.
Texturizer
Applies a texture you select or create to an image. (See
“Using texture and
glass surface controls” on page 323
.)
Video filters
The Video submenu contains the De-Interlace and NTSC Colors filters.
De-Interlace
Smooths moving images captured on video by removing either the odd or
even interlaced lines in a video image. You can choose to replace the discarded lines by
duplication or interpolation.
NTSC Colors
Restricts the gamut of colors to those acceptable for television repro-
duction to prevent oversaturated colors from bleeding across television scan lines.
Other filters
Filters in the Other submenu let you create your own filters, use filters to modify masks,
offset a selection within an image, and make quick color adjustments.
Custom (Photoshop)
Lets you design your own filter effect. With the Custom filter, you
can change the brightness values of each pixel in the image according to a predefined
mathematical operation known as
convolution
. Each pixel is reassigned a value based on
the values of surrounding pixels. This operation is similar to the Add and Subtract calcula-
tions for channels.
You can save the custom filters you create and use them with other Photoshop images.
To create a Custom filter:
1
Choose Filter > Other > Custom.
2
Select the center text box, which represents the pixel being evaluated. Enter the value
by which you want to multiply that pixel’s brightness value, from –999 to +999.
