PHP | Imagick autoLevelImage() Function

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The Imagick::autoLevelImage() function is an inbuilt function in PHP which is used to adjusts the levels of a particular image channel. The level of the image channel is set the minimum and maximum value of color in the full quantum range.

Syntax:

bool Imagick::autoLevelImage( $channel )

Parameters: This function accepts a single parameters $channel which is used to set the auto-levelling.

Return Value: This function returns True on success.

Below programs illustrate the Imagick::autoLevelImage() function in PHP:

Program 1:

<?php 
  
// Create an image object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-9.png'); 
  
// Set the autolevelling of image 
$imagick->autoLevelImage(); 
  
// Display the image 
header("Content-Type: image/jpg"); 
echo $imagick->getImageBlob(); 
?> 

Output:

Program 2:

<?php 
  
// Create an image object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/slider.gif'); 
  
// Set the autolevelling of image 
$imagick->autoLevelImage(); 
  
// Display the image 
header("Content-Type: image/gif"); 
echo $imagick->getImageBlob(); 
?> 