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Node Jimp | Color darken

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  • Last Updated : 05 Oct, 2021

Introduction 
The darken modifier is an inbuilt color modifier in Nodejs | Jimp which is used to darken an image up to a given amount, ranging between 0 to 100. At 100, the image will turn into a black image. 
 

Syntax:  

image.color([
  { apply: 'darken', params: [value] }
]);

Parameter:  

  • value – This parameter stores the amount of darkness to be applied. It takes values from 0 – 100.

Input Images: 
 

 

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
// color function having darken modifier
  image.color([{apply:'darken', params: [50]}])
  .write('darken1.png');
}
 
main();
  console.log("Image Processing Completed");

Output: 
 

Example 2: 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
// color function having darken modifier
  image.color([{apply:'darken', params: [50]}], function(err){
    if (err) throw err;
  })
  .write('darken2.png');
}
 
main();
  console.log("Image Processing Completed");

Output: 
 

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


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