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<Imagick::__constructImagick::contrastStretchImage>
^ImagickLast updated: Mon, 26 Oct 2026

Imagick::contrastImage

(PECL imagick 2, PECL imagick 3)

Imagick::contrastImage — Change the contrast of the image

Description

public function 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

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();
}

?>


<Imagick::__constructImagick::contrastStretchImage>
^ImagickLast updated: Mon, 26 Oct 2026