Imagick::contrastImage

(PECL imagick 2.0.0)

Imagick::contrastImage — Change the contrast of the image

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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.

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sharpen

The sharpen value

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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();
}

?>