Node Jimp | invert

Introduction : The invert() function is an inbuilt function in Nodejs | Jimp which inverts an image’s colors. 

Syntax:

invert(cb)

Parameter:

• cb – This is optional parameter which is invoked when compilation is complete.

Input Images:

Setup Environment : 

npm init -y

Install Dependencies : 

npm install jimp

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');
// invert function
  image.invert()
  .write('invert1.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
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');
// invert function using callback function
  image.invert(function(err){
    if (err) throw err;
  })
  .write('invert2.png');
}

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

Output:

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