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.w3wiki.net/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.w3wiki.net/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