Node Jimp | resize

Introduction
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 optional parameter which stores the scaling method.
• cb – This is optional parameter which is invoked when compilation is complete.

Input Images:

Step 1 : Setting up environment 

npm init -y

Step 2 : Install jimp

npm install jimp --save

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');
// 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
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');
//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