Imagick::linearStretchImage

(PECL imagick 2.0.0)

Imagick::linearStretchImageStretches with saturation the image intensity

Descrição

Imagick::linearStretchImage ( float $blackPoint , float $whitePoint ) : bool

Stretches with saturation the image intensity.

Parâmetros

blackPoint

The image black point

whitePoint

The image white point

Valor Retornado

Retorna TRUE no sucesso.

Exemplos

Exemplo #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();
}

?>

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