(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();
}
?>
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