At the Microsoft Build Tour in Vienna, I had the opportunity to present an enhanced version of the Bluetooth Beacon talk. With the Windows 10 Creators Update, Microsoft released a massive update to the Bluetooth LE capabilities of the OS. This finally allows developers to use the full potential of modern Bluetooth scenarios, including sensors, wearables and beacons.
At Build 2017, Microsoft released three new sessions explaining the capabilities of the new APIs:
When capturing a Mixed Reality scene through HoloLens Spectator View, the resulting photos and videos look amazing. But how to make them more realistic? The right blending mode in Photoshop helps.
Are Spectator View Photos Real?
Of course, the captured Spectator View photo is in many ways different to what you see in HoloLens. First off, it’s only 2D; in the HoloLens, you’d see a real 3D hologram. In this area, the live HoloLens view is much more impressive.
On the other hand, the actual resolution and field of view of the HoloLens is less than a (potentially) 20 Megapixel+ Unity rendering that shows holograms all around you. But the field of view is difficult and somehow unnecessary to simulate as we’re looking on the scene from a 3rd person perspective. Continue reading “More Realistic HoloLens Spectator View Photos”
Mobile Apps are no longer simple tools and games. They have grown to amazingly complex systems. Which ingredients are necessary to successfully develop a next generation app?
You will need Artificial Intelligence / Machine Learning. Only the best performance will satisfy your customers – or do you want to wait more than a few seconds in a mobile app? How can you visualize your user interface with HoloLens?
At the #mdaw15, you will learn how to develop and plan such apps with modern frameworks. Join the next After-Work event in St. Pölten for free at https://mobility.builders/
What is a Mobile Developer After-Work Event?
#mdaw events are mixtures of conferences with more casual meet-ups. Different expert speakers approach an overall topic from diverse perspectives. Afterwards, there’s plenty of time for networking and discussion amongst attendees – with snacks and drinks, of course.
The events target mobile developers and decision makers. The goal is to dive deeper into relevant and already known topic areas, as well as to keep up to date with the constantly evolving and changing toolset of the mobile world.
In the meantime, we can look back to 14 previous #mdaw events. Topics so far included business apps, digital healthcare, Xamarin, user experience or a Refugee Hackathon. We’re organizing the events with technology partners like Microsoft, Oracle, IBM, the City of Vienna and many others.
The community has grown to around 500 attendees, and we continue to get more and more developers on board with each event!
Together with Helmut Krämer, I’ve founded the community in 2013 and am proud that it’s still around. We’ve had a tremendous impact on the Austrian developer community so far. With the upcoming #mdaw15, we’re extending the reach geographically and host our first event outside of Vienna, to reach even more developers!
Did you follow the blog post series on setting up Spectator View for HoloLens? The following issues frequently occured when testing Spectator View. To make your life easier, make sure you check these troubleshooting tips & tricks:
In the final part of the HoloLens Spectator View series, I’ll add the final tweak to my sample project and show you what kind of photos the Compositor actually saves on your PC. Getting to this point has taken a lot more work than expected (+ a lot more blog posts, too!), but I still feel that the journey was worth it! You can finally get great photos and videos of the mixed reality experience on HoloLens.
Script Execution Order
Sending the updates didn’t work right away, so I searched for other changes that the sample does differently from my app that might be responsible. One such case was the Script Execution Order.
To make Spectator View work in our own HoloLens project, we actually have to understand how it’s working, what it is doing and how it is related to the HoloLens Sharing Experience. Turns out that there is a lot to do in our app (including transmitting custom messages) to prepare it for the full Spectator View experience!
Synchronizing Objects: Anchor & SceneManager
The Spectator View is based on the Sharing experience of the HoloToolkit, but it contains its own “fork” of the code. Instead of us having to manually decide & code which objects and interactions to send via network messages (as in the normal Sharing use case), the fork of the Spectator View transmits some data by default to our DSLR-mounted HoloLens.
With the first Bluetooth 5 devices just released (first and foremost the Samsung Galaxy S8), Bluetooth Beacons like Apple iBeacon and Eddystone by Google gain a lot of potential. Increased range means future beacons will cover a much larger area, without increased power consumption. With the payload increase of beacon advertisement frames from 31 bytes to 255 bytes, the amount of information transmitted by beacons can substantially increase.
In my session about Bluetooth Beacons at the Mobile Developer After-Work #14: Creating Immersive Environments, I provided a short update about the latest news. Unfortunately, recording of the live session at the event failed. Therefore, I’ve re-recorded it – you will miss the live experience, but I did have a little more time for more detailed explanations of some important facts, so it’s well worth watching again even if you have been at the #mdaw14 Event!
In the previous part, we’ve re-compiled Spectator View using the latest HoloToolkit sources. At the time of writing, this resulted in a compile error, as the HoloToolkit for Unity has seen a breaking change since Spectator View was released.
In this part, we’ll first fix the Spectator View code, and then set it up correctly in our own Unity scene. Then, we’ll need to check several other things: how to launch the Sharing Service, adding Internet Connectivity and the Holographic Camera prefab.
Fixing the Spectator View Code
From the two choices at the end of part 4, of course, we go with the adventurous road to fix the code 🙂
Getting Spectator View to run with your own app is obviously the most important step. How to include the required tools – including Sharing – into your app using the latest versions?
More specifically, I’ll add Spectator View to my playground project, which is mainly for placing a hologram in the room (with a few other useful scripts). Currently, this hologram is a nice, life-size skeleton from the Unity asset store.
HoloToolkit-Unity & Holographic Academy
The Holographic Academy course 240 explains how to set up your project to include Shared Holograms. It’s a good idea to work through the tutorial, as it will show you some of the basics of what is needed for Spectator View.
However, as with most of the Academy tutorials, it’s quite old. The HoloToolkit has evolved since then, and the demos often have little resemblance to what your project would look like if you start from scratch.
According to ABI research, 8.2 million Bluetooth Beacons have been shipped. In 2021, the yearly shipments will have increased to an astonishing number of 565 million beacons per year.
The Bluetooth Beacon Interactor for Windows 10 is a free & open source app for scanning your environment for Beacons. It was the first Bluetooth Beacon scanner app available for Windows 10 and works on PCs, smartphones and even the Microsoft HoloLens.
New Features in Version 2.0
The app has just received an update to version 2.0, which adds the two most requested features:
URLs in Eddystone URL frames are now clickable. You can directly open the web site linked to by Physical Web beacons.
Thanks to a community contribution by kobush, the app now also supports beacons compatible to Apple iBeacons / Proximity Beacons.
You can download the source code of the Bluetooth Beacon Interactor and its base Universal Beacon Library at GitHub. If you would like to scan your surroundings for Bluetooth Beacons and analyze their contents, you can directly download the app from the Windows 10 App Store.