public static function calculateSimilarity($pathToImage1, $pathToImage2)
{
if (!Image::isImageFile($pathToImage1)) {
throw new \InvalidArgumentException(sprintf('Error: "%s" is not an image file.', $pathToImage1), 1449430004);
}
if (!Image::isImageFile($pathToImage2)) {
throw new \InvalidArgumentException(sprintf('Error: "%s" is not an image file.', $pathToImage2), 1449430075);
}
$image1 = new ComparableImage($pathToImage1);
$image2 = new Image($pathToImage2);
return $image1->calculateSimilarityTo($image2);
}
public function loadImage()
{
$this->rejectIfKnownToHaveWrongOrientation();
parent::loadImage();
$this->recordMetadataIfNotDoneYet();
$imageResource = $this->imageResource;
if ($this->desiredAspectRatio !== null) {
$requiredOrientation = Image::getOrientationFromAspectRatio($this->desiredAspectRatio);
// Only accept proper orientation pictures.
if (!$this->hasOrientation($requiredOrientation)) {
throw new \Exception('Incorrect orientation (should be ' . $requiredOrientation . ').', 1441638938);
}
if ($this->desiredAspectRatio !== $this->getAspectRatio()) {
$imageResource = self::cropImageResourceToAspectRatio($imageResource, $this->desiredAspectRatio);
}
}
if ($this->maxWidth !== null) {
$imageWidth = \imagesx($imageResource);
if ($imageWidth > $this->maxWidth) {
$downsizedWidth = $this->maxWidth;
$downsizedHeight = $downsizedWidth / $this->desiredAspectRatio;
$imageResource = self::resizeImageResource($imageResource, $downsizedWidth, $downsizedHeight);
}
}
$this->setImageResource($imageResource);
$this->generateSignature();
$this->freeImageResourceMemory();
}
/**
* Compare this image with the given image using signatures (i.e. downsized
* copies of each image).
*
* @param ComparableImage $otherImage The Image to compare this Image with.
* @return int The difference between the two signatures.
*/
public function compareWith($otherImage)
{
// Get this image's signature.
$thisSignature = $this->getSignature();
// Get the other image's signature.
$otherSignature = $otherImage->getSignature();
// Return the difference of the two signature images.
return $thisSignature->getAbsoluteDifference($otherSignature);
}