Imagick::brightnessContrastImage
(PECL imagick 3 >= 3.3.0)
Imagick::brightnessContrastImage — Change the brightness and/or contrast of an image
説明
public Imagick::brightnessContrastImage(float
$brightness
, float $contrast
, int $channel
= Imagick::CHANNEL_DEFAULT): boolChange the brightness and/or contrast of an image. It converts the brightness and contrast parameters into slope and intercept and calls a polynomical function to apply to the image.
パラメータ
brightness
-
contrast
-
channel
-
戻り値
成功した場合に true
を返します。
例
例1 Imagick::brightnessContrastImage()
<?php
function brightnessContrastImage($imagePath, $brightness, $contrast, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->brightnessContrastImage($brightness, $contrast, $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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