PHP | Imagick getImageExtrema() Function

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The Imagick::getImageExtrema() function is an inbuilt function in PHP which is used to get the extrema for an image. Extrema are the points at which a maximum or minimum value of a function is observed.

Syntax:

array Imagick::getImageExtrema( void )

Parameters: This function doesn’t accept any parameters.

Exceptions: This function throws ImagickException on error.

Return Value: This function returns an associative array containing the keys as “min” and “max”.

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

Program 1:

<?php 
  
// Create new imagick object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-13.png'); 
  
// Get the extrema 
$extrema = $imagick->getImageExtrema(); 
  
print_r($extrema); 
?> 

Output:

Array ( [min] => 0 [max] => 65535 )

Program 2:

<?php 
  
// Create new imagick object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/20190918234528/colorize1.png'); 
  
// Get the extrema 
$extrema = $imagick->getImageExtrema(); 
  
print_r($extrema); 
?> 