is-progressive-jpeg

An utility module which will check an image is progressive jpeg or not and provide scan count of the given image.

Installation

As Node module:

You can use npm to download and install:

npm install is-progressive-jpeg

As ES Module:

Download the file is-progressive-jpeg-es6.js from the path https://github.com/saravanan-a-r/Progressive-JPEG-check/tree/master/src For Usage/Example, refer Example section.

API Documentation

This module built using Builder design pattern. For more information about the Builder design pattern, click here

1) <module_instance>.setImage(<path to an image>)

This method setImage() will set an image that we are going to process.

2) <module_instance>.isProgressive()

This method isProgressive() will return promise object which will resolve with true if the given image is progressive. Otherwise, resolve with false.

3) <module_instance>.noOfScan()

This method noOfScan() will return promise object which will resolve with scan count. For baseline image, count will be 1.

Example

Using it as Node module,

const progressiveChecker = require('ProgressiveChecker');
let checker = progressiveChecker.setImage('test1.jpeg');
checker.isProgressive().then( (result) => {
	console.log('test1.jpeg :: isProgressive() : ' + result);
});
checker.noOfScan().then( (result) => {
	console.log('test1.jpeg :: noOfScan() : ' + result);
});

Using it as ES Module,

import ProgressiveChecker from "is-progressive-jpeg-es6";
let checker = ProgressiveChecker.setImage('test1.jpeg');
checker.isProgressive().then( (result) => {
	console.log('test1.jpeg :: isProgressive() : ' + result);
});
checker.noOfScan().then( (result) => {
	console.log('test1.jpeg :: noOfScan() : ' + result);
});