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PHP - Manual: Gmagick::separateimagechannel - 互联网笔记

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PHP - Manual: Gmagick::separateimagechannel

2025-05-14

Gmagick::separateimagechannel

(PECL gmagick >= Unknown)

Gmagick::separateimagechannelSeparates 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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官方地址:https://www.php.net/manual/en/gmagick.separateimagechannel.php

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