SunshinePHP Developer Conference 2015

Imagick::whiteThresholdImage

(PECL imagick 2.0.0)

Imagick::whiteThresholdImageForce all pixels above the threshold into white

Descrierea

bool Imagick::whiteThresholdImage ( mixed $threshold )

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

Parametri

threshold

Valorile întoarse

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 1 note

up
0
elmer at web-axis dot net
5 years ago
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();
?>
To Top