Imagick::modulateImage
(PECL imagick 2.0.0)
Imagick::modulateImage — Control the brightness, saturation, and hue
说明
$brightness
, float $saturation
, float $hue
)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 ();
}
?> 用户评论:
[#1] Anonymous [2008-11-30 15:36:10]
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();
?>