(PECL imagick 2, PECL imagick 3)
Imagick::sepiaToneImage — Sepia tones an image
public Imagick::sepiaToneImage ( float $threshold ) : bool
Applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning. Threshold ranges from 0 to QuantumRange and is a measure of the extent of the sepia toning. A threshold of 80 is a good starting point for a reasonable tone.
threshold
Returns true on success.
Throws ImagickException on error.
Example #1 Imagick::sepiaToneImage()
<?php
function sepiaToneImage($imagePath, $sepia) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->sepiaToneImage($sepia);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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https://www.php.net/manual/en/imagick.sepiatoneimage.php