Imagick::modulateImage()

(PECL imagick 2.0.0)

Control the brightness, saturation, and hue

说明

Imagick::modulateImage(float $brightness,float $saturation,float $hue): bool

Lets you control the brightness, saturation, and hue of an image. Hue is the percentage of absolute rotation from the current position. For example 50 results in a counter-clockwise rotation of 90 degrees, 150 results in a clockwise rotation of 90 degrees, with 0 and 200 both resulting in a rotation of 180 degrees.

参数

$brightness

$saturation

$hue

返回值

成功时返回TRUE。

范例

Example #1 Imagick::modulateImage()

<?php
function modulateImage($imagePath, $hue, $brightness, $saturation) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->modulateImage($brightness, $saturation, $hue);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>

Here's a example of this function:
<?php
 $img = new Imagick();
 $img->readImage($image_file_name);
 // leave hue at 100%, drop saturation by 100%, leave brightness at 100%
 $img->modulateImage(100, 0, 100); 
 $img->writeImage($thumb_file_name);
 $img->clear();
 $img->destroy();
?>