Imagick::adaptiveThresholdImage
(PECL imagick 2.0.0)
Imagick::adaptiveThresholdImage — Selects a threshold for each pixel based on a range of intensity
Description
bool Imagick::adaptiveThresholdImage ( int $width , int $height , int $offset )Selects an individual threshold for each pixel based on the range of intensity values in its local neighborhood. This allows for thresholding of an image whose global intensity histogram doesn't contain distinctive peaks.
Parameters
width
Width of the local neighborhood.
height
Height of the local neighborhood.
offset
The mean offset
Return Values
Returns TRUE on success.
Examples
Example #1 Imagick::adaptiveThresholdImage()
<?php
function?adaptiveThresholdImage($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();
}
?>← Imagick::adaptiveSharpenImage
Imagick::addImage →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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