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A novel hardware-oriented ultra-high-speed object detection algorithm based on convolutional neural network

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Abstract

This paper describes a hardware-oriented two-stage algorithm that can be deployed in a resource-limited field-programmable gate array (FPGA) for fast-object detection and recognition with out external memory. The first stage is the bounding boxes proposal with a conventional object detection method, and the second is convolutional neural network (CNN)-based classification for accuracy improvement. Frequently accessing external memories significantly affects the execution efficiency of object classification. Unfortunately, the existing CNN models with a large number of parameters are difficult to deploy in FPGAs with limited on-chip memory resources. In this study, we designed a compact CNN model and performed the hardware-oriented quantization for parameters and intermediate results. As a result, CNN-based ultra-fast-object classification was realized with all parameters and intermediate results stored on chip. Several evaluations were performed to demonstrate the performance of the proposed algorithm. The object classification module consumes only 163.67 Kbits of on-chip memories for ten regions of interest (ROIs), this is suitable for low-end FPGA devices. In the aspect of accuracy, our method provides a correctness rate of 98.01% in open-source data set MNIST and over 96.5% in other three self-built data sets, which is distinctly better than conventional ultra-high-speed object detection algorithms.

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Notes

  1. https://www.xilinx.com/products/boards-and-kits/ek-z7-zc706-g.html

  2. https://pytorch.org/

  3. http://sipi.usc.edu/database/.

  4. http://yann.lecun.com/exdb/mnist/

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Acknowledgements

This work was partly supported by the National Natural Science Foundation of China (Grant No. 61673376).

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Authors and Affiliations

  1. The Research Center of Precision Sensing and Control, Institute of Automation, Chinese Academy of Sciences, Beijing, China

    Jianquan Li, Xianlei Long, Shenhua Hu, Yiming Hu, Qingyi Gu &  De Xu

  2. The School of Computer and Control Engineering, University of Chinese Academy of Sciences, Beijing, China

    Jianquan Li, Xianlei Long, Shenhua Hu, Yiming Hu, Qingyi Gu &  De Xu

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  1. Jianquan Li
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  2. Xianlei Long
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  3. Shenhua Hu
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  4. Yiming Hu
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  5. Qingyi Gu
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  6. De Xu
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Correspondence to Qingyi Gu.

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Li, J., Long, X., Hu, S. et al. A novel hardware-oriented ultra-high-speed object detection algorithm based on convolutional neural network. J Real-Time Image Proc 17, 1703–1714 (2020). https://doi.org/10.1007/s11554-019-00931-5

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  • DOI: https://doi.org/10.1007/s11554-019-00931-5

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