Improved single-photon active imaging through ambient noise guided missing data filling

Xie, Jiaheng; Zhang, Zijing; Jia, Fan; Huang, Mong‐Han; Zhao, Yuan

doi:10.1016/j.optcom.2021.127747

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Three-dimensional (3D) imaging technology based on time-correlated single photoncounting (TCSPC) lidar has single-photon detection sensitivity and picoseconds time resolution, which can be used to obtain fine surface topography of the target at very low illumination laser power or to obtain images of long-distance targets [1][2][3]. It has broad application prospects in underwater target detection [4][5][6], remote sensing [7], and other 3D imaging fields [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

High-Flux Fast Photon-Counting 3D Imaging Based on Empirical Depth Error Correction

Wang,

Zhang,

Kang

et al. 2023

Photonics

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The time-correlated single-photon-counting (TCSPC) three-dimensional (3D) imaging lidar system has broad application prospects in the field of low-light 3D imaging because of its single-photon detection sensitivity and picoseconds temporal resolution. However, conventional TCSPC systems always limit the echo photon flux to an ultra-low level to obtain high-accuracy depth images, thus needing to spend amounts of acquisition time to accumulate sufficient photon detection events to form a reliable histogram. When the echo photon flux is increased to medium or even high, the data acquisition time can be shortened, but the photon pile-up effect can seriously distort the photon histogram and cause depth errors. To realize high accuracy TCSPC depth imaging with a shorter acquisition time, we propose a high-flux fast photon-counting 3D imaging method based on empirical depth error correction. First, we derive the photon flux estimation formula and calculate the depth error of our photon-counting lidar under different photon fluxes with experimental data. Then, a function correction model between the depth errors and the number of echo photons is established by numerical fitting. Finally, the function correction model is used to correct depth images at high photon flux with different acquisition times. Experimental results show that the empirical error correction method can shorten the image acquisition time by about one order of magnitude while ensuring a moderate accuracy of the depth image.

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Section: Introductionmentioning

confidence: 99%

High-Flux Fast Photon-Counting 3D Imaging Based on Empirical Depth Error Correction

Wang,

Zhang,

Kang

et al. 2023

Photonics

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Single-Photon Depth Imaging Using a Photodetector With a Wire-Bonding Quenching Resistor

Liu,

et al. 2023

IEEE Sensors J.

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High-resolution depth imaging with a small-scale SPAD array based on the temporal-spatial filter and intensity image guidance

Kang¹,

Xue

Wang

et al. 2022

Opt. Express

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Currently single-photon avalanche diode (SPAD) arrays suffer from a small-scale pixel count, which makes it difficult to achieve high-resolution 3D imaging directly through themselves. We established a CCD camera-assisted SPAD array depth imaging system. Based on illumination laser lattice generated by a diffractive optical element (DOE), the registration of the low-resolution depth image gathered by SPAD and the high-resolution intensity image gathered by CCD is realized. The intensity information is used to guide the reconstruction of a resolution-enhanced depth image through a proposed method consisting of total generalized variation (TGV) regularization and temporal-spatial (T-S) filtering algorithm. Experimental results show that an increasement of 4 × 4 times for native depth image resolution is achieved and the depth imaging quality is also improved by applying the proposed method.

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Improved single-photon active imaging through ambient noise guided missing data filling

Cited by 4 publications

References 18 publications

High-Flux Fast Photon-Counting 3D Imaging Based on Empirical Depth Error Correction

High-Flux Fast Photon-Counting 3D Imaging Based on Empirical Depth Error Correction

Single-Photon Depth Imaging Using a Photodetector With a Wire-Bonding Quenching Resistor

High-resolution depth imaging with a small-scale SPAD array based on the temporal-spatial filter and intensity image guidance

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