The Imagick::setSamplingFactors() function is an inbuilt function in PHP which is used to set the image sampling factors.
Syntax:
bool Imagick::setSamplingFactors( array $factors )
Parameters: This function accepts a single parameter $factors which holds an associative array containing sampling factors.
Return Value: This function returns TRUE on success.
Exceptions: This function throws ImagickException on error.
Below given programs illustrate the Imagick::setSamplingFactors() function in PHP:
Program 1:
PHP
<?php// Create a new imagick object$imagick = new Imagick(// Set the Sampling factors$imagick->setSamplingFactors(array('6', '7', '8'));// Get the Sampling factors$samplingFactors = $imagick->getSamplingFactors();print("<pre>".print_r($samplingFactors, true)."</pre>");?> |
Output:
Array
(
[0] => 6
[1] => 7
[2] => 8
)
Program 2:
PHP
<?php// Create a new imagick object$imagick = new Imagick(// Set the format to jpg$imagick->setImageFormat('jpg');// Set the sampling factors$imagick->setSamplingFactors(array('1x1', '2x2'));// Save the image$compressed = $imagick->getImageBlob();// Create a new imagick object$reopen = new Imagick();$reopen->readImageBlob($compressed);// Resize it to same size$reopen->resizeImage(667, 184, 0, 1);// Show the outputheader("Content-Type: image/jpg");echo $reopen->getImageBlob();?> |
Output:
Reference: https://www.php.net/manual/en/imagick.setsamplingfactors.php
