Node Jimp | brightness
The brightness() function is an inbuilt function in Nodejs | Jimp that 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 that is invoked when compilation is complete.
Input Images:
Setup Environment :
npm init -y
Install Dependencies :
npm install jimp
Example 1: In this example, we will see the use of brightness().
javascript
// npm install --save jimp // import jimp library to the environment const Jimp = require( 'jimp' ); // User-Defined Function to read the images async function main() { const image = await Jimp.read ( 'https://media.w3wiki.net/wp-content/uploads/20190328185307/gfg28.png' ); // contrast function image.brightness(.4) .write( 'brightness1.png' ); } main(); console.log( "Image Processing Completed" ); |
Output:
Example 2: With cb (optional parameters)
javascript
// npm install --save jimp // import jimp library to the environment const Jimp = require( 'jimp' ); // User-Defined Function to read the images async function main() { const image = await Jimp.read ( 'https://media.w3wiki.net/wp-content/uploads/20190328185333/gfg111.png' ); // contrast function using callback function image.brightness(-.5, function (err) { if (err) throw err; }) .write( 'brightness2.png' ); } main(); console.log( "Image Processing Completed" ); |
Output:
Reference: https://www.npmjs.com/package/jimp