Imagick::blackThresholdImage

(PECL imagick 2.0.0)

Imagick::blackThresholdImage — Forces all pixels below the threshold into black

Descrição

bool Imagick::blackThresholdImage ( mixed $threshold )

Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

Parâmetros

threshold: The threshold below which everything turns black

Valor Retornado

Retorna TRUE no sucesso.

Changelog

Versão	Descrição
2.1.0	Now allows a string representing the color as a parameter. Previous versions allow only an ImagickPixel object.

Exemplos

Exemplo #1 Imagick::blackThresholdImage()


<?php
function blackThresholdImage($imagePath, $thresholdColor) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->blackthresholdimage($thresholdColor);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>