How to flip an image in Node Jimp?

NodeJS – Flip() is an inbuilt function that is used to flip the images. The images can be flipped either vertically or hoizontally as defined in the function. By default, the images are flipped horizontally.

Syntax

flip(h, v, cb)

Definition of flip() paramters

• h – It takes a boolean value as an input. Image will be flipped horizontally if this is TRUE.

• v – It takes a boolean value as an input. Image will be flipped vertically if this is TRUE.

• cb – This is also an optional parameter that can be invoked after the compilation is complete.

Input Image

Using Node JIMP – FLIP()

Before proceeding to use flip() functions, please check that the following statements are already executed for setting up the environment.

• npm init -y // Initialising the Node environment

• npm install jimp --save // Installing the jimp dependency

• Create a flip.js file and copy-paste the following code snippet in it.

• Use node flip.js to run the code.

Note − Note that the method name should match with the JS file name. Only then, it will be able to call the desired method.

Example

const Jimp = require('jimp') ;

async function flip() { // Function name is same as of file name
   // Reading Image
   const image = await Jimp.read
   ('/home/jimp/tutorials_point_img.jpg');
   image.flip(true, false, function(err){
      if (err) throw err;
   })
   .write('/home/jimp/flip.jpg');
}

flip(); // Calling the function here using async
console.log("Image is processed successfully");

Output

Using Node JIMP – FLIP() when 'v' is TRUE

Example

const Jimp = require('jimp') ;

async function flip() {
   // Reading Image
   const image = await Jimp.read
   ('/home/jimp/tutorials_point_img.jpg');
   image.flip(true, true, function(err){
      if (err) throw err;
   })
   .write('/home/jimp/flip.jpg');
}

flip();
console.log("Image is processed successfully");

Output