Node Jimp | invert

Last Updated : 15 Apr, 2019

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:

Example 1:

// 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)

// 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

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