Imagick::transformImageColorspace

(PECL imagick 3)

Imagick::transformImageColorspace — Transforms an image to a new colorspace

说明

public Imagick::transformImageColorspace(int $colorspace): bool

Transforms an image to a new colorspace.

参数

colorspace: The colorspace the image should be transformed to, one of the COLORSPACE constants e.g. Imagick::COLORSPACE_CMYK.

返回值

成功时返回 true。

范例

示例 #1 Imagick::transformImageColorspace() example

Transforms an image to a new colorspace, and then extracts a single channel so that the individual channel values can be viewed.


<?php
function transformImageColorspace($imagePath, $colorSpace, $channel) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->transformimagecolorspace($colorSpace);
    //channel should be one of the channel constants e.g. \Imagick::CHANNEL_BLUE 
    $imagick->separateImageChannel($channel);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>

参见

Imagick::setColorSpace() - Set colorspace

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User Contributed Notes 1 note

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A.Ross ¶

7 years ago


This SO question and answer might help clarify why transformImageColorspace is useful: http://stackoverflow.com/questions/29296779/convert-pdf-with-transparency-and-cmyk-to-jpg

Also, there's a Github issue here that explains the difference between transformImageColorspace and setImageColorspace: https://github.com/rmagick/rmagick/pull/75

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备份地址：http://www.lvesu.com/blog/php/imagick.transformimagecolorspace.php