Imagick
PHP Manual

Imagick::contrastImage

Change the contrast of the image

Description

bool Imagick::contrastImage ( bool $sharpen )

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

Returns TRUE on success.

Errors/Exceptions

Throws ImagickException on error.

Examples

Example #1 Imagick::contrastImage

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

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

?>