Description

# Imagick::brightnessContrastImage

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Imagick::brightnessContrastImage — Description

### 説明

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.

### パラメータ

`brightness`

`contrast`

`channel`

### 返り値

成功した場合に `TRUE` を返します。

### 例

例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();
}
?>`