Adobe Illustrator CS4 - Manual (Page 368)

361 USING ADOBE ILLUSTRATOR CS4
Creating special effects
Pointillize Breaks up the color in an image into randomly placed dots, as in a pointillist painting, and uses the
background color as a canvas area between the dots.
See also
“ Effects quick reference ” on page 357
Sharpen effect
The Unsharp Mask command in the Sharpen submenu in the Effect menu focuses blurry images by increasing the
contrast of adjacent pixels. This effect is raster-based and uses the document’s raster effects settings whenever you
apply the effect to a vector graphic.
Unsharp Mask Finds the areas in the image where significant color changes occur and sharpens them. Use the
Unsharp Mask effect to adjust the contrast of edge detail and produce a lighter and darker line on each side of the edge.
This effect emphasizes the edge and creates the illusion of a sharper image.
See also
“ Effects quick reference ” on page 357
Sketch effects
Many of the Sketch effects use black and white colors to redraw the image. The effects are raster-based and use the
document’s raster effects settings whenever you apply the effect to a vector graphic.
Bas Relief Transforms an image to appear carved in low relief and lit to accent the surface variations. Dark areas of the
image are colored black; light colors are colored white.
Chalk & Charcoal Redraws an image’s highlights and midtones with a solid midtone gray background drawn in coarse
chalk. Shadow areas are replaced with diagonal charcoal lines. The charcoal is drawn in black, the chalk in white.
Charcoal Redraws an image to create a posterized, smudged effect. Major edges are drawn boldly while midtones are
sketched using a diagonal stroke. Charcoal is colored black; the paper is colored white.
Chrome Treats the image as if it were a polished chrome surface. Highlights are high points and shadows are low
points in the reflecting surface.
Conté Crayon Replicates the texture of dense dark and pure white Conté crayons on an image. The Conté Crayon
effect uses black for dark areas and the white for light areas.
Graphic Pen Uses fine, linear ink strokes to capture the details in the original image. The effect replaces color in the
original image using black for ink and white for paper. This command is especially striking with scanned images.
Halftone Pattern Simulates the effect of a halftone screen while maintaining the continuous range of tones.
Note Paper Creates an image that appears to be constructed of handmade paper. The effect simplifies an image, and
combines the effect of the Grain command (Texture submenu) with an embossed appearance. Dark areas of the image
appear as holes in the top layer of paper surrounded by white.
Photocopy Simulates the effect of photocopying an image. Large areas of darkness tend to copy only around their
edges; midtones fall away to either solid black or white.
Plaster Molds an image as if from plaster, and then colorizes the result using black and white. Dark areas are raised;
light areas are sunken.
Reticulation Simulates the controlled shrinking and distorting of film emulsion to create an image that appears
clumped in the shadow areas and lightly grained in the highlights.