(PECL imagick 2, PECL imagick 3)
Imagick::contrastImage — Change the contrast of the image
$sharpen
): boolEnhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced.
sharpen
The sharpen value
Returns true
on success.
Throws ImagickException on error.
Example #1 Imagick::contrastImage()
<?phpfunction contrastImage($imagePath, $contrastType) { $imagick = new \Imagick(realpath($imagePath)); if ($contrastType != 2) { $imagick->contrastImage($contrastType); } header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>