Optics and Precision Engineering, Volume. 29, Issue 12, 2754(2021)

Rotary polarization detection imaging system based on dynamic vision sensor

Xiao-tian LU1... Feng LI1,*, Xue YANG1,2, Zhi-yi ZHAO1,4 and Jun-yan HOU3 |Show fewer author(s)
Author Affiliations
  • 1Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing00094, China
  • 2International Institute for Earth System Science, Nanjing University, Nanjing1003, China
  • 3Beijing Institute of Remote Sensing Information, Beijing100011, China
  • 4Beijing Information Science &Technology University, Beijing100192, China
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    Figures & Tables(13)
    Difference between dynamic vision sensor and traditional camera
    Irradiance distribution of reflected light with vibration azimuth at different angles of incidence and Brewster angles
    Internal composition and control panel of polarization imaging system
    Spectral transmittance of polarizer
    Images of different degrees of polarization at incident argle of 20°
    Four series images of DVS
    Gray image of road scene
    Four series images of road scene
    Flow chart for time median processing method based on sequence images
    Results of 100 frame input images processed by time median processing method of sequence images
    • Table 1. DVS parameters

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      Table 1. DVS parameters

      PropertyEvent outputPropertyFrame output
      Spatial resolution346×260Spatial resolution346×260
      Temporal resolution1 μsFrame rate40 frame/s
      Max throughput100 MEPSDynamic range55 dB
      Typical latency<1 msFNP4.2%
      Dynamic rangeApprox.120 dB(0.1-100k lux with 50% of pixels repond to 80% contrast)Dark signal18 000e/s
      Contrast sensitivity14.3%(on),22.5%(off)(with 50% of pixels respond)Readout noise55e
    • Table 2. Parameters of rotary control system

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      Table 2. Parameters of rotary control system

      参 数
      电源电压/V12,24
      额定电流/A2~3.7
      电机轴径/mm8
      功率/W30
      转速/(r·min-13 000~7 000
      最大扭矩/(N·cm-119.6
      工作温度/℃-30~80
      工作湿度/%<95
      开口直径/cm10
    • Table 3. Raspberry pi 4B platform information

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      Table 3. Raspberry pi 4B platform information

      型号Raspberry Pi 4BUSB interfaceUSB2.0×2/USB3.0×2
      SOCBroadcom BCM2711HDMIMicro HDMI×2支持4K60
      CPU64-bit 1.5GHz 4Core供电接口Type C(5 V 3 A)
      GPUBroadcom VideoCore IV@500 MHzWifi网络

      802.11AC无线

      2.4/5 GHz双频Wifi

      蓝牙蓝牙5.0有线网络千兆以太网
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    Xiao-tian LU, Feng LI, Xue YANG, Zhi-yi ZHAO, Jun-yan HOU. Rotary polarization detection imaging system based on dynamic vision sensor[J]. Optics and Precision Engineering, 2021, 29(12): 2754

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    Paper Information

    Category: Modern Applied Optics

    Received: May. 6, 2021

    Accepted: --

    Published Online: Jan. 20, 2022

    The Author Email: LI Feng (lifeng@qxslab.cn)

    DOI:10.37188/OPE.20212912.2754

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