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Node Jimp | invert
  • Last Updated : 22 Feb, 2021

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

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// 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
// invert function
  image.invert()
  .write('invert1.png');
}
 
main();
  console.log("Image Processing Completed");

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Output: 
 

Example 2: With mode and cb (optional parameters) 
 

javascript

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brightness_4
code

// 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
// invert function using callback function
  image.invert(function(err){
    if (err) throw err;
  })
  .write('invert2.png');
}
 
main();
  console.log("Image Processing Completed");

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Output: 
 

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

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