Node Jimp | Gaussian

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:

Setup Environment : 

npm init -y

Install Dependencies : 

npm install jimp

Example 1:

javascript

//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)

javascript

//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