Node Jimp | fade - GeeksforGeeks

Introduction
The fade() function is an inbuilt function in Nodejs | Jimp which fades each pixel by a factor between 0 and 1.
Syntax:

fade(f, cb)

Parameter:

f – This parameter stores the value by which image is made transparent. It has a range of 0 to 1. 1 will turn the image completely transparent.
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'); 
// fade function 
  image.fade(.5) 
  .write('fade1.png'); 
} 
  
main(); 
  console.log("Image Processing Completed"); 

Output:

Example 2: With f 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'); 
// fade function using callback function 
  image.fade(0.8, function(err){ 
    if (err) throw err; 
  }) 
  .write('fade2.png'); 
} 
  
main(); 
  console.log("Image Processing Completed"); 

Output:

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

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