(PECL imagick 2, PECL imagick 3)
Imagick::linearStretchImage — Stretches with saturation the image intensity
Stretches with saturation the image intensity.
blackPoint
The image black point
whitePoint
The image white point
Returns true
on success.
Example #1 Imagick::linearStretchImage()
<?phpfunction linearStretchImage($imagePath, $blackThreshold, $whiteThreshold) { $imagick = new \Imagick(realpath($imagePath)); $pixels = $imagick->getImageWidth() * $imagick->getImageHeight(); $imagick->linearStretchImage($blackThreshold * $pixels, $whiteThreshold * $pixels); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>