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();
}
?>← Imagick::levelImage
Imagick::liquidRescaleImage →
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