Imagick::modulateImage

(PECL imagick 2.0.0)

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

說明

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.

參數

brightness
saturation
hue

回傳值

成功時回傳 TRUE。

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User Contributed Notes 1 note

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Anonymous ¶

15 years ago


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();

?>

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