The Imagick class
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Imagick::orderedPosterizeImage

(PECL imagick 2.2.2)

Imagick::orderedPosterizeImagePerforms an ordered dither

说明

bool Imagick::orderedPosterizeImage ( string $threshold_map [, int $channel=Imagick::CHANNEL_ALL ] )
Warning

本函数暂无文档,仅有参数列表。

Performs an ordered dither based on a number of pre-defined dithering threshold maps, but over multiple intensity levels, which can be different for different channels, according to the input arguments.

参数

threshold_map

A string containing the name of the threshold dither map to use

channel

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.

返回值

Returns TRUE on success.

错误/异常

Throws ImagickException on error.


The Imagick class
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