PHP is developed and maintained by a global community of contributors.
The PHP Foundation helps fund this work. If PHP is part of your business or projects, consider sponsoring the Foundation.
(PECL imagick 2, PECL imagick 3)
Imagick::linearStretchImage — Stretches with saturation the image intensity
Stretches with saturation the image intensity.
blackPointThe image black point
whitePointThe image white point
Повертає true в разі успіху.
Приклад #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();
}
?>