Cloudinary Blog
Build a Facial Emotion Recognition Based Video Suggestion App

Developers are always looking for new and creative ways to deliver content that resonates with the way users feel. Often using the latest technical innovations the market has to offer such as Artificial Intelligence (AI) and Machine Learning (ML). What better way to demonstrate innovative uses of these technology in a consumer market than capturing expressions from your users and then serving content based on that expression!

In this article we are going to build an app that suggests videos to users based on their facial expressions (i.e. emotion). To do this, we will use Cloudinary’s Advanced Facial Attributes Detection Add-on and the Cloudinary Video Player.

Set Up Cloudinary

Cloudinary makes adding image and video optimizations to applications a breeze. Head over to the Solutions Page to learn more about the features offered.

First, sign up for Cloudinary. Once you have created an account, you are able to use the “Advanced Facial Attributes Detection” add-on.

Note
You can add the “Advanced Facial Attributes Detection” to your Cloudinary account here and follow the on-screen instructions.

Advanced Facial Attributes Detection Add-on

Make sure to note your API_KEY , API_SECRET and CLOUD_NAME from your developer console. This information is needed when integrating with your application.

Upload Images and Retrieve Facial Emotion Recognition from Images

Using Cloudinary to obtain the emotion from a facial image requires the Advanced Facial Attributes Detection Add-on when uploading the image. We add the adv_face as a tag to let Cloudinary know we are going to use the Advanced Facial Attributes Detection add-on to register the emotions from the detected users face.

When the image is successfully uploaded, emotions detected from the face and their confidence values are returned as part of the result. The emotion with the highest confidence is then selected.

JavaScript Sample:

cloudinary.uploader.upload( req.body.image , function(result) {
  const emotions = result.info.detection.adv_face.data[0].attributes.emotion;
  let arr = JSON.parse(JSON.stringify(emotions));
  let visible_emotion = getMaxKey(arr); // this function gets the emotion with the highest confidence
  return res.json({
    status: true,
    emotion: visible_emotion
  })
},{ detection: "adv_face" });

You can then return the detected emotion to the frontend of your application.

Creating Video Playlists Based on emotion

Once the emotion is obtained on the front end, we want to display a set of videos to the user that correspond to the selected emotion. The Cloudinary Video Player makes creating playlists simple. You can create a video player and then populate it with videos from your media library that are tagged with the highest confidence emotion, such as ‘happiness’.

JavaScript Sample:

let emotion = "happiness";
let cld = cloudinary.Cloudinary.new({ cloud_name: CLOUD_NAME, secure: true});b
// initialize video player
let demoplayer = cld.videoPlayer('elementID');
//  create playlist based on emotion
demoplayer.playlistByTag( emotion, { sourceParams: {angle:0}, autoAdvance: 0, repeat: true, presentUpcoming: 5});

Putting it all together, we have the sample of how it all works below:

Video Suggestion at Work

Conclusion

In this post, we have shown how to use the Advanced Facial Attributes Detection add-on from Cloudinary to create an application that enables us to serve videos to our users based on how they are feeling at the moment. We also leveraged the Cloudinary Video Player to serve the videos in a playlist format. You can learn more about using the video player and feel free to check out the github repository for the full source code. If you are up for the challenge, clone and submit your own Video Suggestion App below!

Recent Blog Posts

Techniques for Image Enhancement With Cloudinary

Indisputably, visual presentations of events, places, people, and even intangible things make deeper impressions and linger in our minds for longer than words or any other communication medium, hence the meteoric rise through the ages of transmitting ideas and promoting brands in the business sector through images. The recent discovery of the first image of a black hole has generated calls for techniques for enhancing digital images. Specifically, the clamor is for quality-oriented tweaks that would result in optimal display and increased visibility of slightly hidden yet important content.

Read more
Video Manipulations and Delivery for Angular Video Apps

On social media, videos posted by users constitute a significant amount of the content appeal on those platforms. From upload to manipulation to delivery, a smooth, efficient, and effective pipeline for the posting process is mandatory to ensure consistent user sessions and their steadily increasing volume. However, building such an infrastructure is a complex, labor-intensive, and problem-prone undertaking.

Read more
Green Screen Queen: Dynamic Video Transparency Fit For Royalty

If you were reading your social media or news feeds on or around June 11 this year, no doubt you came across your fair share of posts about Queen Elizabeth and her outfit-color faux pas. For her 90th birthday, she chose a solid neon green suit, and it didn't take long for Photoshop fanatics to suggest alternative designs for the Queen's green-screen threads.

Read more
Content-Aware Automatic Cropping for Video

Delivering videos according to the aspect ratios defined by social media for multiple devices and platforms is a growing challenge. The continuously rising volume of vertical videos and the corresponding increase in video traffic on mobile devices (now up to 57% of online videos watched) have only exacerbated the situation, with no letup in sight.

Read more
Use a custom function in the image delivery pipeline

Cloudinary offers a wide array of image manipulations and effects to apply to images as part of our image-processing pipeline, helping to ensure that your images fit the graphic design of your website or mobile application. Cloudinary is an open platform, and you can use our APIs, Widgets and UI to build the media management flow that matches your needs.

Read more