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:
Setup Environment :
npm init -y
Install Dependencies :
npm install jimp
Example 1:
javascript
// npm install --save jimp// import jimp library to the environmentvar Jimp = require('jimp');// User-Defined Function to read the imagesasync function main() { const image = await Jimp.read// 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 environmentvar Jimp = require('jimp');// User-Defined Function to read the imagesasync 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"); |
Output:
Reference: https://www.npmjs.com/package/jimp
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