Php/docs/imagick.linearstretchimage
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Imagick::linearStretchImage
(PECL imagick 2, PECL imagick 3)
Imagick::linearStretchImage — Stretches with saturation the image intensity
Description
public Imagick::linearStretchImage
( float $blackPoint
, float $whitePoint
) : bool
Stretches with saturation the image intensity.
Parameters
blackPoint- The image black point
whitePoint- The image white point
Return Values
Returns TRUE on success.
Examples
Example #1 Imagick::linearStretchImage()
<?phpfunction linearStretchImage($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();}?>
