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    Gmagick::separateimagechannel

    (PECL gmagick >= Unknown)

    Gmagick::separateimagechannel — Separates a channel from the image

    說明

    public Gmagick Gmagick::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.

    參數

    channel

    Identify which channel to extract: RedChannel, GreenChannel, BlueChannel, OpacityChannel, CyanChannel, MagentaChannel, YellowChannel, BlackChannel.

    回傳值

    The Gmagick object on success

    錯誤/例外

    錯誤時拋出 GmagickException。

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