PHP | Imagick contrastImage() Function

The Imagick::contrastImage() function is an inbuilt function in PHP which is used to change the contrast of the image. This function enhances the intensity differences between the lighter and darker elements of the image.

Syntax:

bool Imagick::contrastImage(bool $sharpen)

Parameters: This function accepts a single parameter $sharpen which decides whether to increase or decrease the contrast.

Return Value: This function returns True on success.

Errors/Exceptions: This function throws ImagickException on error.

Below given programs illustrate the Imagick::contrastImage() function in PHP:

Program 1:

<?php

// Create new Imagick object
$imagick = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-9.png');

// Apply the contrastImage() function
$imagick->contrastImage(false);

header("Content-Type: image/png");

// Display the output image
echo $imagick->getImageBlob();
?>

Output:

Program 2:

<?php

// Create new Imagick object
$imagick = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-9.png');

// Apply the contrastImage() function
$imagick->contrastImage(true);

header("Content-Type: image/png");

// Display the output image
echo $imagick->getImageBlob();
?>

Output:

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