Node Jimp | resize

The resize() function is an inbuilt function in Nodejs | Jimp which resizes the image to a set width and height using a 2-pass bilinear algorithm. 

Syntax:

resize(w, h, mode, cb)

Parameter:

• w: This parameter stores the width of the image.
• h: This parameter stores the height of the image.
• mode: This is an optional parameter that stores the scaling method.
• cb: This is an optional parameter that is invoked when compilation is complete.

Input Images:

Step 1: Setting up the environment 

npm init -y

Step 2: Install jimp

npm install jimp --save

Example 1:  In this example, we will see the use of jimp in resizing the image

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');
    // rotate Function having rotation as 55
    image.resize(323, 421)
        .write('resize1.png');
}

main();
console.log("Image Processing Completed");

Output:

Example 2: With 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');
    //rotate Function having rotation angle as 99, mode and callback function
    image.resize(1024, 768, Jimp.RESIZE_BEZIER, function (err) {
        if (err) throw err;
    })
        .write('resize2.png');
}

main();
console.log("Image Processing Completed");

Output:

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