Imagick::transformImageColorspace

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Imagick::transformImageColorspaceTransforms an image to a new colorspace.

Description

bool Imagick::transformImageColorspace ( int $colorspace )

Transforms an image to a new colorspace.

Liste de paramètres

colorspace

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

Valeurs de retour

Cette fonction retourne TRUE en cas de succès ou FALSE si une erreur survient.

Exemples

Exemple #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();
}
?>

Voir aussi

Exemples

Exemple #2 Imagick::transformImageColorspace()

<?php
function transformImageColorspace($imagePath$colorSpace$channel) {
    
$imagick = new \Imagick(realpath($imagePath));
    
$imagick->transformimagecolorspace($colorSpace);
    
$imagick->separateImageChannel($channel);
    
header("Content-Type: image/jpg");
    echo 
$imagick->getImageBlob();
}

?>

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User Contributed Notes 1 note

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A.Ross
2 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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