Imagick::adaptiveThresholdImage

(PECL imagick 2.0.0)

Imagick::adaptiveThresholdImage — Selects a threshold for each pixel based on a range of intensity

Descrierea

Imagick::adaptiveThresholdImage ( int $width , int $height , int $offset ) : bool

Selects an individual threshold for each pixel based on the range of intensity values in its local neighborhood. This allows for thresholding of an image whose global intensity histogram doesn't contain distinctive peaks.

Parametri

width: Width of the local neighborhood.
height: Height of the local neighborhood.
offset: The mean offset

Valorile întoarse

Întoarce TRUE în caz de succes.

Exemple

Example #1 Imagick::adaptiveThresholdImage()


<?php
function adaptiveThresholdImage($imagePath, $width, $height, $adaptiveOffset) {
    $imagick = new \Imagick(realpath($imagePath));
    $adaptiveOffsetQuantum = intval($adaptiveOffset * \Imagick::getQuantum());
    $imagick->adaptiveThresholdImage($width, $height, $adaptiveOffsetQuantum);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>