Imagick::blackThresholdImage
(PECL imagick 2.0.0)
Imagick::blackThresholdImage — Forces all pixels below the threshold into black
Description
bool Imagick::blackThresholdImage ( mixed $threshold )Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.
Parameters
threshold
The threshold below which everything turns black
Return Values
Returns TRUE on success.
Changelog
Version | Description |
|---|---|
2.1.0 | Now allows a string representing the color as a parameter. Previous versions allow only an ImagickPixel object. |
Examples
Example #1 Imagick::blackThresholdImage()
<?php
function blackThresholdImage($imagePath, $thresholdColor) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->blackthresholdimage($thresholdColor);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>← Imagick::averageImages
Imagick::blueShiftImage →
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