PDF Compare with PHP and ImageMagick
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<?php | |
declare(strict_types=1); | |
$controlDocument = new Imagick(); | |
$compareDocument = new Imagick(); | |
// Optionally control the fuzz distance | |
// $controlDocument->setOption('fuzz', '2%'); | |
// Set image resolution | |
// $controlDocument->setResolution(100, 100); | |
// $compareDocument->setResolution(100, 100); | |
// Load documents | |
$controlDocument->readImage('control.pdf'); | |
$compareDocument->readImage('compare.pdf'); | |
// Compare images using AE metric | |
$result = $controlDocument->compareImages($compareDocument, Imagick::METRIC_ABSOLUTEERRORMETRIC); | |
// Calculate percentage | |
$diffPercentage = $result[1] * 100 / ($controlDocument->getImageWidth() * $controlDocument->getImageHeight()); | |
echo "Document is " . number_format($diffPercentage, 4) . "% different."; | |
// Save reconstructed image | |
$result[0]->setImageFormat("png"); | |
file_put_contents('test.png', $result[0]); | |
echo PHP_EOL; |
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