Node Jimp | brightness

Introduction
The brightness() function is an inbuilt function in Nodejs | Jimp which adjusts the brightness of the image by a value of -1 to +1.

Syntax:

brightness(n, cb)

Parameter:

  • n – This parameter stores the amount to adjust the brightness, a number between -1 and +1
  • cb – This is an optional parameter which is invoked when compilation is complete.

Input Images:

Example 1:

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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
// contrast function
  image.brightness(.4)
  .write('brightness1.png');
}
  
main();
  console.log("Image Processing Completed");

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Output:

Example 2: With cb (optional parameters)

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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
// contrast function using callback function
  image.brightness(-.5, function(err){
    if (err) throw err;
  })
  .write('brightness2.png');
}
  
main();
  console.log("Image Processing Completed");

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Output:

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



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