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