Single-pixel photon counting 3D imaging system and method based on multi-resolution wavelet approximation
A photon counting and multi-resolution technology, used in radio wave measurement systems, re-radiation of electromagnetic waves, instruments, etc. Reliable effect
Active Publication Date: 2019-05-07
NANJING UNIV OF SCI & TECH
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The purpose of the present invention is to provide a fast, accurate, high-resolution single-pixel photon counting three-dimensional imaging system and method based on multi-resolution wavelet approximation, to solve the problem that the traditional photon counting three-dimensional imaging method is limited by spatial resolution and long imaging time The problem
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0028] The single-pixel photon counting three-dimensional imaging system of the present invention based on multi-resolution wavelet approximation selects PicoQuant's LDH series 830nm wavelength pulse laser as the structured light source, which has 4mW average emission power, 10MHz pulse repetition frequency and 300ps pulse width. The DMD used is the Vialux ALP 4.2 series, with 1024×768 resolution and 4G on-chip memory, and the maximum flip frequency of the micromirror is about 22.7kHz. In this embodiment, the integration time is set to 1 ms. The projection lens and imaging lens of the projection lens are respectively 50mm and 35mm Nikon standard lenses. The single photon detector uses Hamamatsu H7422P-50 photon counting PMT. The narrow band filter has a transmission wavelength width of 10nm. TCSPC is PicoHarp300 of PicoQuant Company.
[0029] Such as Figure 4 As shown in (a), the target scene is composed of cardboard with letters "NJ", "U", and "ST", and a black rubber pad b...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a single-pixel photon counting three-dimensional imaging system and method based on multi-resolution wavelet approximation. The imaging system comprises a structure light projection system, a photon receiving system and a synchronous control and signal processing system; a target scene is imaged through adopting a single-photon camera structure formed by combining a single-pixel photon detector and a digital micro-mirror device (DMD). According to a multi-resolution wavelet approximation principle, detail information from a low resolution to a high resolution ratio of the target scene is gradually obtained from an initial resolution ratio image, and is used for reconstructing a final resolution ratio three-dimensional image. According to the single-pixel photon counting three-dimensional imaging system and method, the number of times of sampling is effectively reduced and the imaging time is shortened; the single-pixel photon counting three-dimensional imaging system and method are applicable to high resolution ratio three-dimensional imaging application; meanwhile, the computation cost of a CS (Chirp Scaling) algorithm is avoided and the time needed by reconstruction is shortened; the single-photon camera structure formed by combining the single-pixel photon detector and the DMD is utilized so that the system size is reduced and the system structure is simplified; the single-pixel photon counting three-dimensional imaging system and method have the characteristics of simple structure, high reliability and low cost.
Description
Technical field [0001] The invention belongs to the field of photon counting three-dimensional imaging technology, in particular to a photon counting three-dimensional imaging system using a single-pixel detector, and a photon counting three-dimensional imaging method based on multi-resolution wavelet approximation applied to the system. Background technique [0002] Photon counting three-dimensional imaging has the characteristics of high detection sensitivity and high range resolution. It can obtain target scene reflectance and three-dimensional structure information under extremely dark lighting conditions, which has attracted widespread attention. [0003] In photon counting three-dimensional imaging, the system obtains distance information by measuring the flight time of photons from emission to reflection by the target scene and received by a single-photon detector. At present, the traditional photon counting three-dimensional imaging system can achieve sub-millimeter distanc...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 顾国华王成戴慧东何伟基叶凌冒添逸陈钱姜睿妍俞媛媛葛雨涵
Owner NANJING UNIV OF SCI & TECH