HolographicDepthBasedImageStabilization

Depth-based focus plane

Shows how to set the focus plane automatically by looking at your depth buffer. A least-squares fit method is used to determine the plane that best fits the geometry that the user can see; in that way, the plane passes through as much scene content as possible to reduce color separation. This is a good default mode for setting up the focus plane, especially in cases where the scene is complex and the optimal focus point and plane may be difficult to determine.

Note: This sample is part of a large collection of UWP feature samples. If you are unfamiliar with Git and GitHub, you can download the entire collection as a ZIP file, but be sure to unzip everything to access shared dependencies. For more info on working with the ZIP file, the samples collection, and GitHub, see Get the UWP samples from GitHub. For more samples, see the Samples portal on the Windows Dev Center.

The plane is computed separately for each holographic camera, since each has its own view of scene geometry, and each uses a different depth buffer. The implementation provided by this code sample takes very little power and frame time.

Setting the exact position and velocity of the content can sometimes be better, depending on your content. For an example, see the Holographic Tag-along Sample.

Holographic rendering best practices

This sample demonstrates best practices for user comfort by always setting the image stabilization plane.

Note The image stabilization plane can be observed via the Windows Device Portal.

Compute shaders

This sample demonstrates how to use compute shaders to gather and average data points. Compute shaders require shader model 5.0. Running this code sample in the HoloLens emulator will require a feature level 11_0 or higher GPU.

Additional remarks

Note The Windows universal samples for Windows 10 Holographic require Visual Studio 2017 Update 3 to build, and a Windows Holographic device to execute. Windows Holographic devices include the Microsoft HoloLens and the Microsoft HoloLens Emulator.

To obtain information about Windows 10 development, go to the Windows Dev Center.

To obtain information about the tools used for Windows Holographic development, including Microsoft Visual Studio and the Microsoft HoloLens Emulator, go to Install the tools.

Reference

The following Windows Universal APIs are used to demonstrate setting the image stabilization plane in this code sample:

Windows.Graphics.Holographic
HolographicCamera class
HolographicCameraRenderingParameters class
HolographicCameraRenderingParameters.SetFocusPoint methods

System requirements

Client: Windows 10 Holographic

Phone: Not supported

Build the sample

1. If you download the samples ZIP, be sure to unzip the entire archive, not just the folder with the sample you want to build.
2. Start Microsoft Visual Studio 2017 and select File > Open > Project/Solution.
3. Starting in the folder where you unzipped the samples, go to the Samples subfolder, then the subfolder for this specific sample, then the subfolder for your preferred language (C++, C#, or JavaScript). Double-click the Visual Studio Solution (.sln) file.
4. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample to the Microsoft HoloLens emulator

• Click the debug target drop-down, and select Microsoft HoloLens Emulator.
• Select Build > Deploy Solution.

Deploying the sample to a Microsoft HoloLens

• Developer unlock your Microsoft HoloLens. For instructions, go to Enable your device for development.
• Find the IP address of your Microsoft HoloLens. The IP address can be found in Settings > Network & Internet > Wi-Fi > Advanced options. Or, you can ask Cortana for this information by saying: "Hey Cortana, what's my IP address?"
• Right-click on your project in Visual Studio, and then select Properties.
• In the Debugging pane, click the drop-down and select Remote Machine.
• Enter the IP address of your Microsoft HoloLens into the field labelled Machine Name.
• Click OK.
• Select Build > Deploy Solution.

Pairing your developer-unlocked Microsoft HoloLens with Visual Studio

The first time you deploy from your development PC to your developer-unlocked Microsoft HoloLens, you will need to use a PIN to pair your PC with the Microsoft HoloLens.

• When you select Build > Deploy Solution, a dialog box will appear for Visual Studio to accept the PIN.
• On your Microsoft HoloLens, go to Settings > Update > For developers, and click on Pair.
• Type the PIN displayed by your Microsoft HoloLens into the Visual Studio dialog box and click OK.
• On your Microsoft HoloLens, select Done to accept the pairing.
• The solution will then start to deploy.

Deploying and running the sample

• To debug the sample and then run it, follow the steps listed above to connect your developer- unlocked Microsoft HoloLens, then press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or select Debug > Start Without Debugging.