Compressing three-dimension calculation ghost imaging system and method

Abstract

The invention relates to a compressing three-dimension calculation ghost imaging system. The system comprises a light source, a spatial light modulator, at least four sets of convergence light receiving lenses, at least four sets of point detectors corresponding to the convergence light receiving lenses and an algorithm module. Light emitted by the light source is projected on the spatial light modulator, the spatial light modulator modulates the light randomly, the modulated light is projected on an object, the object reflects the light in different directions, and one set of convergence light receiving lens and point detector are arranged in each of at least four reflecting directions. Total light intensity in all the directions are compressed and sampled by the point detectors, a compressing and sampling result is input into the algorithm module, the processes of the compression and sampling of the total light intensity and the input of the result are repeated for many times, the spatial light modulator modulates different patterns every time, the algorithm module inverts a two-dimension image corresponding to the direction of each point detector by the application of the compressed sensing algorithm according to a measurement matrix and the measurement results obtained by the repeated compression and sampling, the information of shadow parts of the images is compared to construct a three-dimension surface gradient, and finally a three-dimension object shape is reconstructed.

Description

technical field [0001] The invention relates to the field of computational ghost imaging, in particular to a compressed three-dimensional computational ghost imaging system and method. Background technique [0002] Correlation imaging, or ghost imaging (GI), is one of the frontiers and hotspots in the field of quantum optics in recent years. Associative imaging can generate an image of an object on an optical path that does not contain the object, and has received extensive attention as a new imaging technology. The concept of ghost imaging was first demonstrated using spatially entangled photon pairs generated by parametric down-conversion. The principle of ordinary ghost imaging is: there is an object in the optical path of the object arm, but a barrel (single-pixel) detector without spatial resolution is used for detection; there is no object in the optical path of the reference arm, but a The detector with spatial resolution detects the changing light field information...

AI Technical Summary

Problems solved by technology

At present, the research on vision-based 3D reconstruction technology is still in the exploratory stage, and there is still a certain gap between various methods and practical applications, and further in-depth research is urgently needed

[0004] In addition, the existing correlative imaging is mainly limited to small-scale two-dimensional imaging, and the objects used are also simple two-dimensional objects. Even if it is used for three-dimensional imaging, it can only layer out the rough outline of simple three-dimensional objects

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