How to make the azure spatial anchor more accurate?

Scarlett Wangle 41

I have followed the tutorial (https://learn.microsoft.com/en-us/azure/spatial-anchors/tutorials/tutorial-new-unity-hololens-app?tabs=azure-portal) to create an anchor identifier and then locate it. Then I tried to separate the code with the help of Photon, using one Hololens to create the anchor ID and another one to locate it. The problem is that, although the second Hololens successfully located the anchor, its position is far from where I set it with the first Hololens (about 1-2 meters away).

I want to know: Are there any solutions to make it more accurate? Is it my problem, or is it the Azure space anchor itself?

Vlad Constantinescu 81 Reputation points

2023-03-29T14:33:28.63+00:00
Hello Scarlett Wangle,

In order to determine what is causing the large anchor offset you're seeing, can you please help with the following details:

When creating, as well as locating the anchor, did you wait for the device to fully scan the environment?

Is the environment you're placing the anchor(s) in following the guidelines mentioned in https://learn.microsoft.com/en-us/hololens/hololens-environment-considerations?

Last but not least, can you please offer some background information about what it is that you're trying to achieve? In that sense, I'm trying to understand if Azure Spatial Anchors is indeed the right solution for you.
Scarlett Wangle 41 Reputation points

2023-03-30T02:02:37.3966667+00:00
For the above questions:

Yes, I do wait for the device to fully scan the environment. In the case of that example, I wait for the cube to turn green (which indicates a full scan).

The environment which I used to test the function does fit the hololens-environment-considerations. It's a large bright office room with multiple desks in it, and each desk has different things on them.

The function I want to achieve is simple. I'm trying to create a Local multiplayer system and all players can create the object where they tap. Thus, I need to synchronize the objects' locations to make sure all the players can see the same view.

Additional question: I need to create a lot of objects in real-time (maybe five per second), so waiting for anchor creation would cause a large delay. Is there any simple way to achieve this? One player can create the object where they tapped, and the other players can see it appear in the same position in real-time.
Vlad Constantinescu 81 Reputation points

2023-04-03T11:49:58.81+00:00

Regarding your additional question, the scan and locate won’t be real-time and they will have the delay you mentioned.

As for the initial anchor offset issue, can you please try the samples mentioned in https://learn.microsoft.com/en-us/azure/spatial-anchors/quickstarts/get-started-unity-hololens?tabs=azure-portal, as well as https://learn.microsoft.com/en-us/azure/spatial-anchors/tutorials/tutorial-share-anchors-across-devices?tabs=azure-portal%2CVS%2CUnityHoloLens and tell me if you're seeing the same issue?

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How to make the azure spatial anchor more accurate?