Imagick::sepiaToneImage

← separateImageChannel   setCompressionQuality →
Applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning. Threshold ranges from 0 to QuantumRange and is a measure of the extent of the sepia toning. A threshold of 80 is a good starting point for a reasonable tone.

function sepiaToneImage($image_path, $sepia)
{
    $imagick = new \Imagick(realpath($image_path));
    $imagick->sepiaToneImage($sepia);
    header("Content-Type: image/jpeg");
    echo $imagick->getImageBlob();
}