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Imagick::contrastImage

PHP function Edit on GitHub ✎

(PECL imagick 2, PECL imagick 3)

Change the contrast of the image

Description

Imagick::contrastImage(bool $sharpen): bool

Enhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced.

Parameters

sharpen: The sharpen value

Return Values

Success

Errors/Exceptions

Throws

Examples

Imagick::contrastImage()

php

<?php
function contrastImage($imagePath, $contrastType) {
    $imagick = new \Imagick(realpath($imagePath));
    if ($contrastType != 2) {
        $imagick->contrastImage($contrastType);
    }

    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

Source: reference/imagick/imagick/contrastimage.xml · from the official PHP manual (php/doc-en)