The fade() function is an inbuilt function in Nodejs | Jimp that fades each pixel by a factor between 0 and 1.
Syntax:
fade(f, cb)
Parameter:
- f: This parameter stores the value by which the image is made transparent. It has a range of 0 to 1. 1 will turn the image completely transparent.
- cb: This is an optional parameter that is invoked when compilation is complete.
Input Images:
Step 1: Setting up the environment
npm init -y
Step 2: Install jimp
npm install jimp --save
Example 1:
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
// fade function
image.fade(.5)
.write( 'fade1.png' );
} main(); console.log( "Image Processing Completed" );
|
Output:
Example 2: With f and 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
// fade function using callback function
image.fade(0.8, function (err) {
if (err) throw err;
})
.write( 'fade2.png' );
} main(); console.log( "Image Processing Completed" );
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Output:
Reference: https://www.npmjs.com/package/jimp