Imagick
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Imagick::modulateImage

(PECL imagick 2.0.0)

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

说明

bool Imagick::modulateImage ( float $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 .

Imagick
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PHP手册 - N: Control the brightness, saturation, and hue

用户评论:

Anonymous (30-Nov-2008 11:36)

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();
?>