The Imagick::previewImages() function is an inbuilt function in PHP which is used to quickly pin-point appropriate parameters for image processing. It tiles 9 thumbnails of the specified image with an image processing operation applied at varying strengths.
Syntax:
bool Imagick::previewImages( int $preview )
Parameters: This function accepts single parameter $preview which holds the preview type constants. Click here to get the list of preview type constants.
Return Value: This function returns TRUE on success and FALSE on Error or Failure.
Errors/Exceptions: It throws ImagickException while error occurred.
Below program illustrates the Imagick::previewImages() function in PHP:
Program:
php
<?php // Store the image source into variable$imagePath ="https://cdncontribute.geeksforgeeks.org/wp-content/uploads/neveropen-9.png";// Create new Imagick object$imagick = new \Imagick($imagePath);// Use previewImages() function$imagick->previewImages(imagick::PREVIEW_EDGEDETECT);header("Content-Type: image/png");// Display output imageecho $imagick->getImageBlob();?> |
Output:
Reference: https://www.php.net/manual/en/imagick.previewimages.php
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