Imagick::unsharpMaskImage

← uniqueImageColors   vignetteImage →
Sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and Imagick::UnsharpMaskImage() selects a suitable radius for you.

function unsharpMaskImage($image_path, $radius, $sigma, $amount, $unsharpThreshold)
{
    $imagick = new \Imagick(realpath($image_path));
    $imagick->unsharpMaskImage($radius, $sigma, $amount, $unsharpThreshold);
    header("Content-Type: image/jpeg");
    echo $imagick->getImageBlob();
}