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PHP function imagick generates grayscale difference pictures

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Release： 2016-07-25 08:51:35
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  3. $image = new Imagick('cyclops.png');

  4. $clone = $image->clone();

  5. $clone = $image->fximage('p{0,0}');
  6. $image->compositeImage($clone,imagick::COMPOSITE_DIFFERENCE,0,0);
  7. $image->modulateImage( 100, 0, 0);
  8. header( 'Content-Type: image/{$image->getImageFormat()}' );
  9. echo $image->getImageBlob( );

  10. writeImage('difference.png');

  11. $image->clear();
  12. $image->destroy();
  13. ?>
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php函数imagick生成灰度差异图片
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