Imagick::whiteThresholdImage

(PECL imagick 2, PECL imagick 3)

Imagick::whiteThresholdImage — Force all pixels above the threshold into white

Descrierea

public Imagick::whiteThresholdImage ( mixed $threshold ) : bool

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
PECL imagick 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

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elmer at web-axis dot net ¶

15 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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