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This document uses PHP Chinese website manual Release
(PECL gmagick >= Unknown)
Gmagick::normalizeimage — Enhances the contrast of a color image
$channel
] )Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.
channel
Identify which channel to normalize
The Gmagick object on success
错误时抛出 GmagickException。