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    Gmagick::separateimagechannel

    (PECL gmagick >= Unknown)

    Gmagick::separateimagechannel — Separates a channel from the image

    说明

    public Gmagick::separateimagechannel(int $channel): Gmagick

    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

    One of the Channel constant (Gmagick::CHANNEL_*).

    返回值

    The Gmagick object.

    错误／异常

    错误时抛出 GmagickException。

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