Imagick::linearStretchImage
Imagick::linearStretchImage
(PECL imagick 2.0.0)
Imagick::linearStretchImage — Stretches with saturation the image intensity
Description
bool Imagick::linearStretchImage ( float $blackPoint , float $whitePoint )
Stretches with saturation the image intensity.
Parameters
-
blackPoint
-
The image black point
-
whitePoint
-
The image white point
Return Values
Returns TRUE
on success.
Examples
Example #1 Imagick::linearStretchImage()
<?php function linearStretchImage($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(); } ?>
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