上次说到,CMYK格式的JPG用IE6浏览时无法显示,解决方法是用PS之类的软件转成RGB。但对于网站来说,用户并不知道这么解决,所以还是要程序想办法解决了。解决方法是用imagick或者imagemagick来处理图片,imagick代码如下:
- <?php
- $filePath = '/path/to/your/file.jpg';
- $i = new Imagick($filePath);
- $cs = $i->getImageColorspace();
- if ($cs == Imagick::COLORSPACE_CMYK) {
- print "Image is CMYK<br/>n";
- ?>
- CMYK Image:<br/>;
- <img src="<?php echo $filePath ?>"/>
- <br/><br/>
- <?php
- $i->setImageColorspace(Imagick::COLORSPACE_SRGB);
- $i->setImageFormat('jpeg');
- $cs = $i->getImageColorspace();
- if ($cs != Imagick::COLORSPACE_CMYK) {
- print "Image is no longer CMYK<br/>n";
- // write it to a temp file
- $filePath = '/path/to/temp/file.jpg';
- $i->writeImage($filePath);
- }
- } else {
- print "Image is not CMYK<br/>n";
- }
- if ($cs == Imagick::COLORSPACE_SRGB ||
- $cs == Imagick::COLORSPACE_RGB){
- print "Image is RGB<br/>n";
- }
- ?>
- RGB Image:<br/>
- <img src="<?php echo $filePath ?>"/>;
- <?php
- $i->clear();
- $i->destroy();
- $i = null;
Linux下====================
convert -colorspace rgb 123.jpg 123.jpg