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Heterogeneous Fusion of Camera and mmWave Radar Sensor of Optimizing Convolutional Neural Networks for Parking Meter
Chi-Chia Sun1,2, Yong-Ye Lin3, Wei-Jia Hong1
1Department of Electrical Engineering, National Formosa University, Huwei 632, Taiwan.
Sensors (Basel, Switzerland)
|April 28, 2023
Summary
This study introduces a smart parking meter using fused RGB camera and mmWave radar data with convolutional neural networks. The novel approach achieves 99.33% accuracy in challenging outdoor conditions.
Area of Science:
- Computer Vision
- Sensor Fusion
- Machine Learning
Background:
- Street parking detection is challenging due to environmental factors like traffic, shadows, and weather.
- Traditional methods struggle with reliability in adverse conditions such as rain, fog, dust, and glare.
Purpose of the Study:
- To propose a novel heterogeneous fusion of convolutional neural networks for robust smart parking meter systems.
- To enhance parking region detection accuracy under diverse and difficult environmental conditions.
Main Methods:
- A heterogeneous fusion approach combining RGB camera and active mmWave radar sensor data.
- Utilizing convolutional neural networks for individual sensor data processing and fusion.
- Implementation on a GPU-accelerated embedded platform (Jetson Nano) for real-time performance.
Main Results:
- The proposed method accurately detects parking regions even in adverse conditions like rain, fog, dust, snow, and glare.
- Experimental results demonstrate an average accuracy of 99.33% for the heterogeneous fusion method.
- Real-time performance was achieved through heterogeneous hardware acceleration.
Conclusions:
- The developed heterogeneous fusion CNN model offers a highly accurate and robust solution for smart parking meters.
- The system effectively overcomes limitations of single-sensor approaches in challenging outdoor environments.
- This technology has the potential to significantly improve automated parking management systems.

