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(); ?>