Imagick::setColorspace

(PECL imagick 3)

Imagick::setColorspace — Set colorspace

说明

public Imagick::setColorspace(int $COLORSPACE): bool

Sets the global colorspace value for the object. 此方法在Imagick基于ImageMagick 6.5.7以上版本编译时可用。

参数

COLORSPACE: One of the COLORSPACE constants

返回值

成功时返回 true。

错误／异常

错误时抛出 ImagickException。

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simonjjarrett at gmail dot com ¶

4 years ago

This method has to be called BEFORE any files are loaded into the Imagick object.

By default, Imagick will incorrectly read CMYK PDFs - it will read each channel as a greyscale page resulting in 4 times the number of pages. By specifying the desired colorspace (usually SRGB) before reading the file, GhostScript will automatically convert it.

<?php
$im = new Imagick();

// set the sampling resolution
$im->setResolution(200,200);

// set the desired format
$im->SetColorspace(Imagick::COLORSPACE_SRGB);

$im->readimage($file['tmp_name']);
?>

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T ¶

9 years ago

Right now this function doesn't appear to do anything, ref: http://stackoverflow.com/q/10739822/2685496



As mentioned in the answer, modulateImage works fine as a replacement for converting to gray scale.



<?php



$image = new Imagick("input.jpg");



$image->modulateImage(100, 0, 100);



$image->writeImage("output.jpg");



$image->clear();



?>