使用Imagick将图像从RGB转换为CMYK [英] Convert image from RGB to CMYK with Imagick

问题描述

我正在尝试将RGB图像转换为CMYK，因为它们需要打印. 我正在使用此代码:

I'm trying to convert RGB images to CMYK, because they need to be printed. I'm using this code:

<?php
$filePath = 'rgb.jpg';

// First save image as png
$image = new Imagick($filePath);
$image->setImageCompression(Imagick::COMPRESSION_UNDEFINED);
$image->setImageCompressionQuality(0); 
$image->setImageFormat("png");
$filePath = 'rgb.png';
$image->writeImage($filePath);
$image->clear();
$image->destroy();
$image = null;

// Convert colors
$image = new Imagick($filePath);
$image->stripImage();
$image->setImageColorspace(Imagick::COLORSPACE_CMYK);
$image->setImageCompression(Imagick::COMPRESSION_UNDEFINED);
$image->setImageCompressionQuality(0); 
$image->setImageFormat("png");
$filePath = 'cmyk.png';
$image->writeImage($filePath);

$image->clear();
$image->destroy();
$image = null;


$fileUrl = 'http://www.product-designer.nl/rgb2cmyk/cmyk.png';
?>
CMYK Image:<br/>
<img src="<?php echo $fileUrl; ?>" width="400" /><br /><br />
<?php
$fileUrl = 'http://www.product-designer.nl/rgb2cmyk/rgb.png';
?>
RGB Image:<br/>
<img src="<?php echo $fileUrl ?>" width="400" />

您可以在 http://product-designer.nl/rgb2cmyk 上看到结果 我不知道该怎么办，但是图像上的颜色以某种方式变成了反转. 我需要转换图像，但颜色必须尽可能接近RGB颜色.

You can see the result on http://product-designer.nl/rgb2cmyk I don't know how, but somehow the colors on the image become inverted. I need to convert the image but the colors need to be as close to the RGB colors as possible.

有人知道怎么做吗?

谢谢

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