略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: Imagick::randomThresholdImage

2024-12-22

Imagick::randomThresholdImage

(PECL imagick 2, PECL imagick 3)

Imagick::randomThresholdImageCreates a high-contrast, two-color image

说明

public 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. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

参数

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.

返回值

成功时返回 true

范例

示例 #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();
}

?>
add a noteadd a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/imagick.randomthresholdimage.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3