Imagick::randomThresholdImage
(PECL imagick 2.0.0)
Imagick::randomThresholdImage — Creates a high-contrast, two-color image
설명
bool Imagick::randomThresholdImage
( float
$low
, float $high
[, int $channel = Imagick::CHANNEL_ALL
] )Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image. 이 메쏘드는 Imagick을 ImageMagick 6.2.9 이상으로 컴파일 했을 때만 사용할 수 있습니다.
인수
-
low -
The low point
-
high -
The high point
-
channel -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
반환값
성공시에 TRUE를 반환합니다.
예제
Example #1 Imagick::randomThresholdImage()
<?php
function randomThresholdimage($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();
}
?>
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