Imagick::modulateImage

(PECL imagick 2, PECL imagick 3)

Imagick::modulateImage — Control the brightness, saturation, and hue

说明

public 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();
}

?>

User Contributed Notes

Anonymous 30-Nov-2008 03:36


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();


?>