Imagick::linearStretchImage

Stretches with saturation the image intensity

Description

public 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();
}

?>