Node Jimp | Gaussian

Last Updated : 22 Apr, 2019

Introduction
The Gaussian() function is an inbuilt function in Nodejs | Jimp which applies a true Gaussian blur to the image but its processing is quite slow in comparison to other Jimp functions.
Syntax:

gaussian(r, cb)

Parameter:

r – This parameter stores the pixel radius of the blur.
cb – This is an optional parameter which is invoked when compilation is complete.

Input Images:

Example 1:

//npm install --save jimp 
//import jimp library to the environment 
var Jimp = require('jimp'); 
  
//User-Defined Function to read the images 
async function main() { 
  const image = await Jimp.read 
('https://media.geeksforgeeks.org/wp-content/uploads/20190328185307/gfg28.png'); 
// invert function 
  image.gaussian(5) 
  .write('gaussian1.png'); 
} 
  
main(); 
  console.log("Image Processing Completed"); 

Output:

Example 2: With radius and cb (optional parameters)

//npm install --save jimp 
//import jimp library to the environment 
var Jimp = require('jimp'); 
  
//User-Defined Function to read the images 
async function main() { 
  const image = await Jimp.read 
('https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png'); 
//gaussian function using callback function 
  image.gaussian(10, function(err){ 
    if (err) throw err; 
  }) 
  .write('gaussian2.png'); 
} 
  
main(); 
  console.log("Image Processing Completed"); 

Output:

Reference: https://www.npmjs.com/package/jimp

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