Imagick::whiteThresholdImage

(PECL imagick 2.0.0)
Force all pixels above the threshold into white
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.

Parameters:
threshold

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

Returns:

Returns TRUE on success.

Changelog:
2.1.0

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

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

?>

doc_php
2016-02-24 16:01:30
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