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• W2912021728 abstract "This work proposes a hardware-friendly, dense optical flow-based Time-to-Collision (TTC) estimation algorithm intended to be deployed on smart video sensors for collision avoidance. The algorithm optimized for hardware first extracts biological visual motion features (motion energies), and then utilizes a Random Forests regressor to predict robust and dense optical flow. Finally, TTC is reliably estimated from the divergence of the optical flow field. This algorithm involves only feed-forward data flows with simple pixel-level operations, and hence has inherent parallelism for hardware acceleration. The algorithm offers good scalability, allowing for flexible tradeoffs among estimation accuracy, processing speed and hardware resource. Experimental evaluation shows that the accuracy of the optical flow estimation is improved due to the use of Random Forests compared to existing voting-based approaches. Furthermore, results show that estimated TTC values by the algorithm closely follow the ground truth. The specifics of the hardware design to implement the algorithm on a real-time embedded system are laid out." @default.
• W2912021728 created "2019-02-21" @default.
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• W2912021728 date "2019-02-16" @default.
• W2912021728 modified "2023-09-25" @default.
• W2912021728 title "A Hardware-Friendly Optical Flow-Based Time-to-Collision Estimation Algorithm" @default.
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• W2912021728 doi "https://doi.org/10.3390/s19040807" @default.
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