Imagick::segmentImageImagick::separateImageChannel
(PECL imagick 2.0.0)
Imagick::separateImageChannel — Separates a channel from the image
说明
bool Imagick::separateImageChannel
( int
$channel
)Separates a channel from the image and returns a grayscale image. A channel is a particular color component of each pixel in the image.
参数
-
channel -
返回值
成功时返回 TRUE。
错误／异常
错误时抛出 ImagickException。
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