(PECL imagick 2.0.0)
Imagick::normalizeImage — Enhances the contrast of a color image
本函数暂无文档，仅有参数列表。
Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Defaults to Imagick::CHANNEL_ALL. Refer to this list of channel constants.
Returns TRUE on success.