(PECL imagick 3 >= 3.3.0)
Imagick::brightnessContrastImage — Change the brightness and/or contrast of an image
$brightness
, float $contrast
, int $channel
= Imagick::CHANNEL_DEFAULT): boolChange the brightness and/or contrast of an image. It converts the brightness and contrast parameters into slope and intercept and calls a polynomical function to apply to the image.
brightness
contrast
channel
Returns true
on success.
Example #1 Imagick::brightnessContrastImage()
<?phpfunction brightnessContrastImage($imagePath, $brightness, $contrast, $channel) { $imagick = new \Imagick(realpath($imagePath)); $imagick->brightnessContrastImage($brightness, $contrast, $channel); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>