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High Pass Filter Functions
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High pass filters tend to suppress slowly changing details in your images
and to emphasize more rapidly changing details. As noise is usually rapidly
changing, noise can be emphasized as well. JIMSAIP implements two forms of
high pass filter: Crispen and Sharpen. The Sharpen function, which is
stronger than Crispen, uses the eight nearest neighbors of a pixel to
emphasize detail. The Crispen function uses the 4 nearest neighbors of a
pixel. Both filters operate on data in the A buffer and leave the result in
the B buffer. The data in the A buffer is unchanged.
See Average and Blur for other effects.
CB211 Image by Roy Minnich. Used with permission.
