Pixelate filters

The filters in the Pixelate submenu sharply define a selection by clumping pixels of similar color values in cells.

Color Halftone

Simulates the effect of using an enlarged halftone screen on each channel of the image. For each channel, the filter divides the image into rectangles and replaces each rectangle with a circle. The circle size is proportional to the brightness of the rectangle.

To use the Color Halftone filter:

1. Choose Filter > Pixelate > Color Halftone.
2. Enter a value in pixels for the maximum radius of a halftone dot, from 4 to 127.
3. Enter a screen-angle value (the angle of the dot from the true horizontal) for one or more channels:
• For Grayscale images use only channel 1.
• For RGB images, use channels 1, 2, and 3, which correspond to the red, green, and blue channels.
• For CMYK images, use all four channels, which correspond to the cyan, magenta, yellow, and black channels.
• Click Defaults to return all the screen angles to their default values.
4. Click OK.

Crystallize

Clumps pixels into a solid color in a polygon shape.

Facet (Photoshop)

Clumps pixels of solid or similar colors into blocks of like-colored pixels. You can use this filter to make a scanned image look hand painted or to make a realistic image resemble an abstract painting.

Fragment (Photoshop)

Creates four copies of the pixels in the selection, averages them, and offsets them from each other.

Mezzotint

Converts an image to a random pattern of black-and-white areas or of fully saturated colors in a color image. To use the filter, choose a dot pattern from the Type menu in the Mezzotint dialog box.

Mosaic (Photoshop)

Clumps pixels into square blocks. The pixels in a given block are the same color, and the colors of the blocks represent the colors in the selection.

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.