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Imagick::contrastImage

(PECL imagick 2, PECL imagick 3)

Imagick::contrastImage — Change the contrast of the image

Descrizione

public Imagick::contrastImage(bool $sharpen): bool

Enhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced.

Elenco dei parametri

sharpen

The sharpen value

Valori restituiti

Restituisce true in caso di successo.

Errori/Eccezioni

Lancia una ImagickException in caso di errore.

Esempi

Example #1 Imagick::contrastImage()

<?php
function contrastImage($imagePath, $contrastType) {
$imagick = new \Imagick(realpath($imagePath));
if ($contrastType != 2) {
$imagick->contrastImage($contrastType);
}

header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}

?>