Imagick::randomThresholdImage

(PECL imagick 2.0.0)

Imagick::randomThresholdImage — Creates a high-contrast, two-color image

说锟斤拷

Imagick::randomThresholdImage ( float $low , float $high [, 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. 锟剿凤拷锟斤拷锟斤拷Imagick锟斤拷锟斤拷ImageMagick 6.2.9锟斤拷锟较版本锟斤拷锟斤拷时锟斤拷锟矫★拷

锟斤拷锟斤拷

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.

锟斤拷锟斤拷值

锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷

锟斤拷锟斤拷

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();
}

?>