The Gmagick::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 Gmagick::getimageextrema( void )
Parameters:This function doesn’t accept any parameters.
Return Value: This function returns an associative array containing the keys as “min” and “max”.
Exceptions: This function throws GmagickException on error.
Below given programs illustrate the Gmagick::getimageextrema() function in PHP:
Program 1 (For multiple colored image):
<?php // Create a new Gmagick object $gmagick = new Gmagick('neveropen.png'); // Get the extrema $extrema = $gmagick->getimageextrema(); print("<pre>".print_r($extrema, true)."</pre>"); ?> |
Output:
Array
(
[min] => 0
[max] => 65535
)
Program 2 (For single colored image):
<?php // Create a new Gmagick object $gmagick = new Gmagick('singlecolor.png'); // Get the extrema $extrema = $gmagick->getimageextrema(); print("<pre>".print_r($extrema, true)."</pre>"); ?> |
Output:
Array
(
[min] => 7710
[max] => 7710
)
Reference: https://www.php.net/manual/en/gmagick.getimageextrema.php
