Node Jimp | scale

The scale() function is an inbuilt function in Nodejs | Jimp that uniformly scales the image by a factor.

Syntax:

scale(scale, mode, cb)

Parameter:

• scale: This parameter stores the scaling factor 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:

Setup Environment: 

npm init -y

Install Dependencies:

npm install jimp 

Example 1: In this example, we will see the use of scale.

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');
        // scale Function having scaling factor as 0.2
        image.scale(.2)
            .write('scale1.png');
}

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

Output:

Example 2: With mode 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');
        // scale Function having scaling-factor, mode and callback function
        image.scale(3, Jimp.RESIZE_BEZIER, function (err) {
            if (err) throw err;
        })
            .write('scale2.png');
}

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

Output:

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