使用SharpSenses与Intel RealSense SR300相机时触发NullReferenceException

Hey there! Let's figure out why you're hitting that NullReferenceException when using SharpSenses with your SR300 camera—since you've already confirmed the camera works perfectly in RealSense Viewer, we can rule out basic driver or hardware issues. Here are the most likely fixes to try:

1. Verify Hand Tracking Module Initialization #

The LeftHand property is probably null because SharpSenses didn't properly initialize the hand tracking component. Before hooking up event handlers, add a quick check to confirm it's loaded:

var cam = Camera.Create();

// Check if hand tracking was initialized successfully
if (cam.LeftHand == null)
{
    Console.WriteLine("Hand tracking failed to initialize! This could be due to missing dependencies or camera compatibility.");
    return;
}

// Now set up your events safely
cam.LeftHand.Visible += (sender, args) => Console.WriteLine("Left Hand Visible");
cam.LeftHand.NotVisible += (sender, args) => Console.WriteLine("Left Hand Not Visible");

2. Confirm Correct NuGet Dependencies #

SharpSenses relies on Intel's RealSense SDK under the hood. Even if the Viewer works, your project might have missing or mismatched packages:

• Double-check that you've installed both SharpSenses and a compatible Intel.RealSense NuGet package (match the SDK version your RealSense Viewer uses).
• Uninstall and reinstall the packages to fix any corrupted or incomplete installations.

3. Explicitly Enable Hand Tracking (If Required) #

Some versions of SharpSenses need you to manually enable hand tracking features. Look for a method like EnableHandTracking() in the Camera class and call it right after creating the camera instance:

var cam = Camera.Create();
cam.EnableHandTracking(); // Add this line if the method exists

// Proceed with event setup and initialization checks

4. Don't Forget to Start the Tracking Loop #

Without starting the camera's processing loop, hand tracking events will never fire, and you might run into unexpected null states. Add this to your code:

cam.Start();

// Keep the app running to listen for events
Console.WriteLine("Waiting for hand detection... Press Enter to exit.");
Console.ReadLine();

// Clean up resources when done
cam.Stop();

5. Update SharpSenses to the Latest Version #

Older versions of the library might not fully support the SR300's hand tracking capabilities. Update the SharpSenses NuGet package to the latest stable release and test again.

If none of these fix the issue, try enabling debug logging in SharpSenses (if available) to see where initialization is failing—this will give you clearer clues about why LeftHand is null.

内容的提问来源于stack exchange，提问作者rukiman