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Imagick::blurImage> <Imagick::averageImages
Last updated: Fri, 30 Oct 2009

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Imagick::blackThresholdImage

(PECL imagick 2.0.0)

Imagick::blackThresholdImageForces all pixels below the threshold into black

Beschreibung

bool Imagick::blackThresholdImage ( mixed $threshold )
Warnung

Diese Funktion ist bis jetzt nicht dokumentiert. Es steht nur die Liste der Argumente zur Verfügung.

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

Parameter-Liste

threshold

The threshold below which everything turns black

Rückgabewerte

Liefert TRUE bei Erfolg.

Changelog

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



add a note add a note User Contributed Notes
Imagick::blackThresholdImage
elmer at web-axis dot net
01-Dec-2008 12:33
Here's a example of this function:

<?php
  $img
= new Imagick();
 
$img->readImage($image_file_name);
 
$img->blackThresholdImage('grey');
 
$img->writeImage($thumb_file_name);
 
$img->clear();
 
$img->destroy();
?>

Imagick::blurImage> <Imagick::averageImages
Last updated: Fri, 30 Oct 2009
 
 
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