Php/docs/imagick.thresholdimage
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Imagick::thresholdImage
(PECL imagick 2, PECL imagick 3)
Imagick::thresholdImage — Changes the value of individual pixels based on a threshold
Description
public Imagick::thresholdImage
( float $threshold
[, int $channel
= Imagick::CHANNEL_DEFAULT
] ) : bool
Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image.
Parameters
threshold
channel
Return Values
Returns TRUE
on success.
Examples
Example #1 Imagick::thresholdImage()
<?phpfunction thresholdimage($imagePath, $threshold, $channel) { $imagick = new \Imagick(realpath($imagePath)); $imagick->thresholdimage($threshold * \Imagick::getQuantum(), $channel); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>