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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 )

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.

Istoricul schimbărilor

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

Exemple

Example #1 Imagick::whiteThresholdImage()

<?php
function whiteThresholdImage($imagePath$color) {
    
$imagick = new \Imagick(realpath($imagePath));
    
$imagick->whiteThresholdImage($color);
    
header("Content-Type: image/jpg");
    echo 
$imagick->getImageBlob();
}

?>

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User Contributed Notes 1 note

up
-1
elmer at web-axis dot net
6 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();
?>
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