PHP | Imagick getImageHistogram() Function

The Imagick::getImageHistogram() function is an inbuilt function in PHP which is used to get the image histogram.

Syntax:

array Imagick::getImageHistogram( void )

Parameters: This function does not accept any parameter.

Return Value: This function returns an array of ImagickPixel objects containing histogram of image.

Exceptions: This function throws ImagickException on error.

Below program illustrates the Imagick::getImageHistogram() function in PHP:

Program 1:

<?php

// Create a new imagick object
$imagick = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-13.png');

// Get the Histogram
$histogram = $imagick->getImageHistogram();

print("<pre>".print_r($histogram, true)."</pre>");
?>

Output:

Returns an array with 2955 Imagick objects as members.

Program 2:

<?php

// Create a new imagick object
$imagick = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/20190918234528/colorize1.png');

// Get the Histogram
$histogram = $imagick->getImageHistogram();

print("<pre>".print_r($histogram, true)."</pre>");
?>

Output:

Returns an array with 1725 Imagick objects as members.

Reference: https://www.php.net/manual/en/imagick.getimagehistogram.php