Single-pixel photon counting three-dimensional imaging system and method based on multi-resolution wavelet approximation

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 technical field of photon counting three-dimensional imaging, 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 3D imaging has the characteristics of high detection sensitivity and high distance resolution, and can obtain target scene reflectance and 3D structure information under extremely dark lighting conditions, and has attracted extensive attention. [0003] In photon-counting 3D imaging, the system obtains distance information by measuring the time-of-flight of photons from being emitted to being received by single-photon detectors reflected by the target scene. At present, traditional photon counting 3D imaging systems can achieve submillimeter-level distance resolution, but due to the limitation of i...

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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

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