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← 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));
    header("Content-Type: image/jpeg");
    echo $imagick->getImageBlob();