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Filter
Filter is typically useful for high-contrast images which soften or
sharpen edges and boundaries of an image.
No Filter
This is the default filter option. No filtering will take place when
using this option.
Sharpen
This selection emphasizes the edges of an image. It sharpens the
image boundaries by increasing the relative contrast between
adjacent pixels. In general, sharpen filters should only be used
when you want to accentuate the differences between one area and
another.
Sharpen More
This option further emphasizes the edges of an image. This option
produces a much stronger contrast than the Sharpen option.
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