Php/docs/imagick.blackthresholdimage
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Imagick::blackThresholdImage
(PECL imagick 2, PECL imagick 3)
Imagick::blackThresholdImage — Forces all pixels below the threshold into black
Description
public Imagick::blackThresholdImage
( mixed $threshold
) : bool
Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.
Parameters
threshold- The threshold below which everything turns black
Return Values
Returns TRUE on success.
Changelog
| Version | Description |
|---|---|
| PECL imagick 2.1.0 | Now allows a string representing the color as a parameter.
Previous versions allow only an ImagickPixel object. |
Examples
Example #1 Imagick::blackThresholdImage()
<?phpfunction blackThresholdImage($imagePath, $thresholdColor) { $imagick = new \Imagick(realpath($imagePath)); $imagick->blackthresholdimage($thresholdColor); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>
