如何在Unity/HoloLens中集成Darknet YOLO？技术实现咨询

Hey everyone, I'm working on a research project focused on evaluating the real-time object detection performance of Darknet YOLO on HoloLens devices, and right now I'm in the process of integrating the framework into Unity.

Progress So Far #

• Successfully exported the Darknet YOLO package into a DLL file
• Established reliable communication between Unity and the DLL via direct function calls

Marshaling Functions in yolo_dll.cpp #

Below are the marshaling functions I've created in the yolo_dll.cpp file to bridge Unity's C# environment with the C++-based YOLO DLL:

// Initialize YOLO model with config, weights, and class names files
extern "C" __declspec(dllexport) bool YOLO_Init(const char* cfgFilePath, const char* weightsFilePath, const char* classNamesPath) {
    // Implementation to load the YOLO model and set up detection parameters
    return true;
}

// Run detection on a frame passed from Unity
extern "C" __declspec(dllexport) int YOLO_Detect(unsigned char* frameBuffer, int frameWidth, int frameHeight, float* outputResults, int maxResultCount) {
    // Implementation to process the input frame, run detection, and populate results
    return 0;
}

A few key takeaways for anyone tackling a similar integration:

• Using extern "C" is critical to avoid C++ name mangling, which ensures Unity can correctly locate and invoke the DLL functions
• For real-time performance on resource-constrained HoloLens devices, using raw byte arrays to pass frame data between Unity and the DLL is an efficient choice
• Pay close attention to memory management when transferring data between the two environments to prevent leaks or unexpected crashes

内容的提问来源于stack exchange，提问作者suphihowsitgoing