# Imagick::brightnessContrastImage

(PECL imagick 3 >= 3.3.0)

Imagick::brightnessContrastImage — Change the brightness and/or contrast of an image

### Descripción

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.

### Parámetros

`brightness`

`contrast`

`channel`

### Valores devueltos

Devuelve `true` en caso de éxito.

### Ejemplos

Ejemplo #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();
}
?>`