Force all pixels above the threshold into white

# Imagick::whiteThresholdImage

(PECL imagick 2.0.0)

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

### Descrierea

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
--- | ---
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();
}
?>`