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Imagick::getImageChannelExtrema

(PECL imagick 2.0.0)

Imagick::getImageChannelExtremaGets the extrema for one or more image channels

Warning

此函数在 Imagick 3.4.4 中被 废弃,强烈建议不要应用此函数。

说明

Imagick::getImageChannelExtrema ( int $channel ) : array

Gets the extrema for one or more image channels. Return value is an associative array with the keys "minima" and "maxima".

参数

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. Refer to this list of channel constants.

返回值

成功时返回 TRUE

错误/异常

错误时抛出 ImagickException。

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