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Imagick::brightnessContrastImage

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Imagick::brightnessContrastImageDescription

说明

public void Imagick::brightnessContrastImage ( string $brightness , string $contrast [, string $CHANNEL = Imagick::CHANNEL_DEFAULT ] )

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

范例

Example #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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