WebRTC experiment - Recognizing hand gestures

I have created a web application that recognizes hand gestures using WebRTC's getUserMedia API. Here's how it works: when you launch the application the browser will prompt you for the permission to access the camera. Click on 'Accept',and then swipe your hand from right to left and vice versa. You would see that the next image (or the previous image if you swipe from left to right) in the gallery slides through.

You can access the application here.

Please note, I have tested this application on Chrome only and not on other browsers. Also, I have used five images in this demo and it is obvious that no image would be shown if you swipe from right to left when the last image is being shown or when you swipe from left to right when the first image is shown. I have codenamed this application as 'Gesto' and hence the name in the URL of the application.

Comments

How to use the APP_INITIALIZER token to hook into the Angular bootstrap process

I've been building applications using Angular as a framework of choice for more than a year and this post is not about another React vs Angular or the quirks of each framework. Honestly, I like Angular and every day I discover something new which makes development easier and makes me look like a guy who built something very complex in a matter of hours which would've taken a long time to put the correct architecture in place if I had chosen a different framework. The first thing that I learned in Angular is the use of the APP_INITIALIZER token.

On GraphQL and building an application using React Apollo

When I visualize building an application, I would think of using React and Redux on the front-end which talks to a set of RESTful services built with Node and Hapi (or Express). However, over a period of time, I've realized that this approach does not scale well when you add new features to the front-end. For example, consider a page that displays user information along with courses that a user has enrolled in. At a later point, you decide to add a section that displays popular book titles that one can view and purchase. If every entity is considered as a microservice then to get data from three different microservices would require three http requests to be sent by the front-end app. The performance of the app would degrade with the increase in the number of http requests. I read about GraphQL and knew that it is an ideal way of building an app and I need not look forward to anything else. The GraphQL layer can be viewed as a facade which sits on top of your RESTful services o...

Using MobX to manage application state in a React application

I have been writing applications using React and Redux for quite some time now and thought of trying other state management solutions out there. It's not that I have faced any issues with Redux; however, I wanted to explore other approaches to state management. I recently came across MobX and thought of giving it a try. The library uses the premise of `Observables` to tie the application state with the view layer (React). It's also an implementation of the Flux pattern wherein it uses multiple stores to save the application state; each store referring to a particular entity. Redux, on the other hand, uses a single store with top-level state variables referring to various entities.

Sagar Ganatra's Blog

Search This Blog