Imagick::blackThresholdImage

(PECL imagick 2.0.0)

Forces all pixels below the threshold into black

bool Imagick::blackThresholdImage ( mixed $threshold )

Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

Parameters:

threshold

The threshold below which everything turns black

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::blackThresholdImage()

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

Links:

http://php.net/manual/en/imagick.blackthresholdimage.php

doc_php

2025-01-10 15:47:30

Comments