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PHP - Manual: Imagick::brightnessContrastImage

2024-12-21

Imagick::brightnessContrastImage

(PECL imagick 3 >= 3.3.0)

Imagick::brightnessContrastImageDescription

说明

public Imagick::brightnessContrastImage(float $brightness, float $contrast, int $channel = Imagick::CHANNEL_DEFAULT): bool

Change the brightness and/or contrast of an image. It converts the brightness and contrast parameters into slope and intercept and calls a polynomical function to apply to the image.

参数

brightness

contrast

channel

返回值

成功时返回 true

范例

示例 #1 Imagick::brightnessContrastImage()

<?php
function brightnessContrastImage($imagePath$brightness$contrast$channel) {
    
$imagick = new \Imagick(realpath($imagePath));
    
$imagick->brightnessContrastImage($brightness$contrast$channel);
    
header("Content-Type: image/jpg");
    echo 
$imagick->getImageBlob();
}

?>
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官方地址:https://www.php.net/manual/en/imagick.brightnesscontrastimage.php

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