High-precision three-dimensional imaging device based on coaxial translation speckle projector

Abstract

The invention relates to the field of optical three-dimensional imaging, and particularly discloses a high-precision three-dimensional imaging device based on a coaxial translation speckle projector. The high-precision three-dimensional imaging device comprises a control module, a driving circuit, a motor, chromium-plated glass engraved with speckle patterns, an LED illumination light source and a Kohler illumination system consisting of a compound lens array. Compared with a traditional digital speckle projection technology, the automatic control system saves the time for replacing speckle patterns, ensures the translation distance parameter with the maximum irrelevance of the patterns according to experiments, and is more favorable for realizing the real-time performance of three-dimensional reconstruction compared with the previous scheme on the premise of ensuring higher precision, and a novel high-speed and high-precision three-dimensional reconstruction system is realized.

Description

Technical field [0001] The present invention relates to the field of optical three-dimensional imaging, and more particularly to a high-precision three-dimensional imaging device based on coaxial translation of the speckled projector. Background technique [0002] In recent years, the three-dimensional three-dimensional reconstruction techniques based on structural optical encoding are widely used in various fields. The matching three-dimensional reconstruction technique has problems with the poor matching and reconstruction of the weak texture area, and active stereoscopic visual can be enriched or increased by using the carefully designed pattern to projections, transfer, etc. The surface texture, thereby overcoming matching ambiguity, reduces the misunderstanding rate, and can get more accurate and reliable three-dimensional reconstruction results. The structural optical encoding is a variety of ways, wherein the most widely used is the basic principle of the three-dimensional...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the equipment of the existing three-dimensional reconstruction method is not suitable for flexible scene requirements, and the fast switching of patterns cannot be achieved in the experimental scene of multi-frame projection, and it is difficult to meet the real-time requirements. The collection of three-dimensional data of objects constructs a new type of speckle projector that relies on the motor to switch the speckle pattern translation. Driven by the motor, the mechanical structure equipped with the speckle template can be translated according to a predetermined distance to complete the speckle pattern Translational fast switching, where switching time ≤ 10ms, proposed a high-precision 3D imaging device based on a coaxial translational speckle projector

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