Polarimetric target detection under uneven illumination

Huang, Bingjing; Liu, Tiegen; Han, Jianing; Hu, Haofeng

doi:10.1364/oe.23.023603

Cited by 27 publications

(7 citation statements)

References 10 publications

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“…1(b) shows that the impact ionization region locates at the interface between DPW and NBL. Detailed device performance has been submitted elsewhere [4] and is summarized on Table I. The breakdown voltage is about 48 V and the PDP at 780 nm at excess voltage of 5 V is about 10 %.…”

Section: Experimental Methods Results and Discussion Single Spads mentioning

confidence: 99%

CMOS Single-Photon Avalanche Diodes for Light Detection and Ranging in Strong Background Illumination

Huang¹,

Liu²,

Wu³

et al. 2017

Extended Abstracts of the 2017 International Conference on Solid State Devices and Materials

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Section: Experimental Methods Results and Discussion Single Spads mentioning

confidence: 99%

CMOS Single-Photon Avalanche Diodes for Light Detection and Ranging in Strong Background Illumination

Huang¹,

Liu²,

Wu³

et al. 2017

Extended Abstracts of the 2017 International Conference on Solid State Devices and Materials

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“…To deduce the closed-form expression of i our op t , one needs to calculate the extremal solution of the joint probability in Eq. (14). Because the joint probability P (i op t ) • P (i com op t ) always increases with the increase of B, i our op t is also the extremal solution of B.…”

Section: The Methods Of Polarimetric Joint Noise Reduction For Contrast Enhancementmentioning

confidence: 96%

Joint Noise Reduction for Contrast Enhancement in Stokes Polarimetric Imaging

Wang

et al. 2019

IEEE Photonics J.

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Contrast optimization is a key issue in polarimetric imaging for the purpose of target detection. In practice, the noise could induce the intensity fluctuation of the image and thus lead to the decrease of the image contrast. A joint noise reduction method is proposed for contrast enhancement in Stokes polarimetric imaging. The proposed method is based on the relation of the joint polarimetric image set, which includes four images taken to calculate Stokes vector and one image taken at the optimal state of a polarization state analyzer (PSA). By our method, the traditional contrast-enhanced image is modified to decrease the disturbance of noise, and the contrast of the image is further enhanced. Both the theoretical analysis and the real-world experimental results demonstrate that our method can effectively decrease the disturbance by the noise and thus increase the contrast of the image. In particular, it is found that the effect of the proposed method is independent of the optimal PSA state when the regular tetrahedron measurement matrix is implemented.

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“…High-precision calibration of the common optical axis was thereby completed, and the requirements for subsequent image registration were fulfilled. According to the above analysis, we next constructed a four-axis calibration platform, which was composed of the following elements: a luminous theodolite (1), a horizontal rail (2), a vertical rail (3), a load platform (4), a right angle fixed block (5), and a servo drive (6). Each part is marked on Figure 3.…”

Section: Design Of Real-time Optical Sensing and Detection Systemmentioning

confidence: 99%

“…The optical sensing and detection method has become the most popular monitoring method owing to its high resolution, abundant information, and use of simple equipment. However, in bad weather conditions, such as hazy and rainy weather conditions, the atmospheric aerosols and various gases, especially the haze particles, have a serious scattering effect on the light wave [4,5]. The image obtained under these conditions will go through a serious degradation process, which will reduce the efficiency of optical sensing and detecting, as well as the monitoring distance [6,7].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Vision through Haze Based on Polarization Imaging

Wang

Ouyang

et al. 2019

Applied Sciences

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Various gases and aerosols in bad weather conditions can cause severe image degradation, which will seriously affect the detection efficiency of optical monitoring stations for high pollutant discharge systems. Thus, penetrating various gases and aerosols to sense and detect the discharge of pollutants plays an important role in the pollutant emission detection system. Against this backdrop, we recommend a real-time optical monitoring system based on the Stokes vectors through analyzing the scattering characteristics and polarization characteristics of both gases and aerosols in the atmosphere. This system is immune to the effects of various gases and aerosols on the target to be detected and achieves the purpose of real-time sensing and detection of high pollutant discharge systems under bad weather conditions. The imaging system is composed of four polarizers with different polarization directions integrated into independent cameras aligned parallel to the optical axis in order to acquire the Stokes vectors from various polarized azimuth images. Our results show that this approach achieves high-contrast and high-definition images in real time without the loss of spatial resolution in comparison with the performance of conventional imaging techniques.

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Polarimetric target detection under uneven illumination

Cited by 27 publications

References 10 publications

CMOS Single-Photon Avalanche Diodes for Light Detection and Ranging in Strong Background Illumination

CMOS Single-Photon Avalanche Diodes for Light Detection and Ranging in Strong Background Illumination

Joint Noise Reduction for Contrast Enhancement in Stokes Polarimetric Imaging

Real-Time Vision through Haze Based on Polarization Imaging

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