Imagick::adaptiveThresholdImage
(PECL imagick 2, PECL imagick 3)
Imagick::adaptiveThresholdImage — Selects a threshold for each pixel based on a range of intensity
Descrierea
public Imagick::adaptiveThresholdImage
( int
$width
, int $height
, int $offset
) : boolSelects an individual threshold for each pixel based on the range of intensity values in its local neighborhood. This allows for thresholding of an image whose global intensity histogram doesn't contain distinctive peaks.
Parametri
-
width -
Width of the local neighborhood.
-
height -
Height of the local neighborhood.
-
offset -
The mean offset
Valorile întoarse
Întoarce true în caz de succes.
Exemple
Example #1 Imagick::adaptiveThresholdImage()
<?php
function adaptiveThresholdImage($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();
}
?>
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