Imagick::randomThresholdImage
(PECL imagick 2.0.0)
Imagick::randomThresholdImage — Creates a high-contrast, two-color image
Description
bool Imagick::randomThresholdImage ( float $low , float $high [, int $channel = Imagick::CHANNEL_ALL ] )Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
Parameters
low
The low point
high
The high point
channel
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Return Values
Returns TRUE on success.
Examples
Example #1 Imagick::randomThresholdImage()
<?php
function?randomThresholdimage($imagePath,?$lowThreshold,?$highThreshold,?$channel)?{
????$imagick?=?new?\Imagick(realpath($imagePath));
????$imagick->randomThresholdimage(
????????$lowThreshold?*?\Imagick::getQuantum(),
????????$highThreshold?*?\Imagick::getQuantum(),
????????$channel
????);
????header("Content-Type:?image/jpg");
????echo?$imagick->getImageBlob();
}
?>← Imagick::raiseImage
Imagick::readImage →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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