Node Jimp | Gaussian

The Gaussian() function is an inbuilt function in Nodejs | Jimp that 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 that is invoked when compilation is complete.

Input Images:

Setup Environment :

npm init -y

Install Dependencies : 

npm install jimp

Example 1: In this example, we will use the Gaussian() function.

javascript

//npm install --save jimp
//import jimp library to the environment
const 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
const 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