PHP | Imagick gaussianBlurImage() Function

The Imagick::gaussianBlurImage() function is an inbuilt function in PHP which is used to blur an image. This function convolves the image with a Gaussian operator of the given radius and standard deviation (sigma).

Note: For reasonable results, the radius should be larger than sigma.

Syntax:

bool Imagick::gaussianBlurImage( $radius, $sigma, $channel = Imagick::CHANNEL_DEFAULT )

Parameters: This function accepts three parameters as mentioned above and described below:

  • $radius (float type): This parameter gives the radius of the Gaussian area in pixels, excluding the center pixel.
  • $sigma (Float type): This parameter gives the standard deviation of the Gaussian area in pixels.
  • $channel (Int type): This parameter gives a channel (that is valid) as per our requirement. To apply more than one channel, use bitwise operator to combine channel-type constants.

Return Value: This function returns True on success.

Errors: This function throws ImagickException on error.

Original Image:

Now, we will write a PHP program that illustrates the Imagick::gaussianBlurImage() function in PHP to blur the above image.

Program: This program uses Imagick::gaussianBlurImage() function to blur the image.

filter_none

edit
close

play_arrow

link
brightness_4
code

<?php
     
// Create an Imagick object
$imagick = new Imagick(
   
// Use gaussianBlurImage() function to blur the image
$imagick->gaussianBlurImage(10, 8, Imagick::CHANNEL_DEFAULT);
       
// Image header
header("Content-Type: image/jpg");
       
// Display the output image
echo $imagick->getImageBlob();
   
?>

chevron_right


Output:



My Personal Notes arrow_drop_up

Game Design | Cryptography | Web Development

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.