Miniaturization lens-free laser three-dimensional imaging system based on micro-electromechanical system (MEMS) scanning micro-mirror and imaging method thereof

Abstract

The invention discloses a miniaturization lens-free laser three-dimensional imaging system based on a micro-electromechanical system (MEMS) scanning micro-mirror and an imaging method thereof. The miniaturization lens-free laser three-dimensional imaging system adopts a red,green and blue three-color laser as a lighting source, three-color laser output luminous power combines into a bunch of white light to be projected on the surface of an object after modulation, red light components, green light components and blue light components in scattering light on the surface of the object are received by a photoelectric receiver group, and a distance value of a single detected pixel and a range value of three-color light components are obtained by a measuring circuit. A microcontroller calculates three-color luminous value of the single detected pixel according to the range value of the three-color light components, and a three-color real luminous value of the pixel is obtained by using a real-time distance square correction method. The microcontroller controls the MEMS micro-mirror to scan, distance values and three-color real luminous values of all pixels are obtained, a depth image and a gray level image of the object is generated by combination, and a three-dimensional colored image of the object is finally obtained. The miniaturization lens-free laser three-dimensional imaging system needs no optical lens, and is high in imaging resolution ratio, fast in speed, simple in structure and easy to miniaturize.

Description

[0001] technical field [0002] The invention relates to the technical field of three-dimensional imaging, in particular to a miniaturized lensless laser three-dimensional imaging system and an imaging method based on MEMS scanning micromirrors. [0003] Background technique [0004] Compared with traditional two-dimensional imaging technology, three-dimensional imaging technology contains third-dimensional distance or depth information, which can more fully describe the position and motion information of objects in real three-dimensional scenes, so it has many outstanding advantages and broad application prospects ; Especially in recent years, with the continuous development of computer vision technology, there is an urgent need for high-performance 3D imaging in the application fields of target recognition, physical profiling, mobile robot collision avoidance, unmanned vehicle navigation, stereoscopic movies, and virtual reality. . [0005] The 3D imaging technology base...

AI Technical Summary

Problems solved by technology

This kind of three-dimensional imaging technology has simple principle, long detectable distance and high precision, but due to the use of precise, bulky and expensive macroscopic mechanical scanning devices and optical components, such systems generally have poor anti-vibration performance, large volume and high cost; At the same time, due to the slow scanning speed of the macroscopic mechanical scanning device itself, there are aging and wear phenomena during long-term use, the 3D images obtained by using this method have low registration accuracy and poor real-time performance, and are often not suitable for dynamic targets or scenes measurement; in addition, the 3D images acquired by traditional scanning lidar imaging are often monochrome grayscale images, and the imaging color is less realistic

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