Node Jimp | Color greyscale
Introduction
The greyscale modifier is an inbuilt color modifier in Nodejs | Jimp which desaturate an image color into greyscale depending on a given amount, from 0 to 100.
Syntax:
image.color([ { apply: 'greyscale', params: [value] } ]);
Parameter:
- value – This parameter stores the amount of greyscale to apply. It takes values from 0 – 100.
Input Images:
Example 1:
// 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 greyscale modifier image.color([{apply: 'greyscale' , params: [50]}]) .write( 'greyscale1.png' ); } main(); console.log( "Image Processing Completed" ); |
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Output:
Example 2: cb (optional parameters)
//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 greyscale modifier image.color([{apply: 'greyscale' , params: [50]}], function (err){ if (err) throw err; }) .write( 'greyscale2.png' ); } main(); console.log( "Image Processing Completed" ); |
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Output:
Reference: https://www.npmjs.com/package/jimp