Imagick::linearStretchImage
PHP function
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(PECL imagick 2, PECL imagick 3)
Stretches with saturation the image intensity
Description
Imagick::linearStretchImage(float $blackPoint, float $whitePoint): bool
Stretches with saturation the image intensity.
Parameters
blackPointThe image black point
whitePointThe image white point
Return Values
Success
Examples
php
<?php
function linearStretchImage($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();
}
?>