Imagick::brightnessContrastImage
PHP function
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(PECL imagick 3 >= 3.3.0)
Change the brightness and/or contrast of an image
Description
Imagick::brightnessContrastImage(float $brightness, float $contrast, int $channel = Imagick::CHANNEL_DEFAULT): bool
Change the brightness and/or contrast of an image. It converts the brightness and contrast parameters into slope and intercept and calls a polynomial function to apply to the image.
Parameters
brightnesscontrastchannel
Return Values
Success
Examples
Imagick::brightnessContrastImage()
php
<?php
function brightnessContrastImage($imagePath, $brightness, $contrast, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->brightnessContrastImage($brightness, $contrast, $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>