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Imagick::writeImage> <Imagick::waveImage
Last updated: Fri, 20 Nov 2009

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Imagick::whiteThresholdImage

(PECL imagick 2.0.0)

Imagick::whiteThresholdImageForce all pixels above the threshold into white

Descrierea

bool Imagick::whiteThresholdImage ( mixed $threshold )
Avertizare

Această funcţie nu este documentată în prezent; este disponibilă numai lista sa de argumente.

Is like Imagick::ThresholdImage() but force all pixels above the threshold into white while leaving all pixels below the threshold unchanged.

Parametri

threshold

Valorile întroarse

Întoarce TRUE în caz de succes.

Istoria schimbărilor

Versiunea Descriere
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::whiteThresholdImage
elmer at web-axis dot net
30-Nov-2008 11:32
Here's a example of this function:

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

Imagick::writeImage> <Imagick::waveImage
Last updated: Fri, 20 Nov 2009
 
 
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