Multi-camera multi-projection structured light rapid three-dimensional measurement method based on multipath effect
A multi-path effect, three-dimensional measurement technology, applied in measurement devices, optical devices, instruments, etc., can solve the problems of low measurement efficiency, separation of overlapping images, inability to obtain the shape information of the measured object at one time, etc., to improve imaging quality, The effect of avoiding decoding errors
Pending Publication Date: 2021-11-16
苏州费雪克劳德科技有限公司
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Problems solved by technology
[0003] Traditional structured light measurement adopts single-camera single-projection mode, and its research is relatively mature, but it cannot obtain the shape information of the entire surface of the measured object at one time. In order to obtain the panoramic three-dimensional information of the object, many scholars have begun to study multi-camera multi-projection multi-structured light measurement. However, the current multi-camera multi-projection measurement method has the problem of low measurement efficiency and the need to separate overlapping images, which seriously affects its practical application and promotion.
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Embodiment 1
[0055] Example 1 image 3 Shown is a single-camera multi-projection structured light rapid three-dimensional measurement system based on multipath effect, which includes three industrial cameras and lenses, three projectors, computers, acquisition cards, and necessary peripheral connection lines, etc. The camera uses Basler The beA4000-62kc camera of the beat series, the projector adopts Texas Instruments DLP LightCrafter4500, the acquisition card can be matched with the camera, the computer is an i7 processor, and 32G memory; the projector projects the encoded image onto the measured object, and then captured by the camera The images with overlapping images are decoded by the decoding method of multipath effect to obtain the three-dimensional point cloud information, and finally obtain the structural size of the measured object.
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The invention provides a multi-camera multi-projection structured light rapid three-dimensional measurement method based on a multipath effect. The method comprises the following steps of: 1) building a multi-camera multi-projector three-dimensional measurement platform comprising cameras, lenses, projectors, an image collection card and a computer, and and 2) starting the computer, connecting the cameras, the projectors and the image collection card, and debugging the system for linkage work. According to the method of the invention, a multi-camera multi-projection structured light system is regarded as a wireless transmission model of a multipath channel with different time delays, depth information of an object to be measured is regarded as an unknown parameter of the system, and then a carrier signal (coded image) is utilized to excite the system, the unknown parameter, namely the depth information of the object to be measured, is directly solved from the amplitude, frequency or phase of a received aliasing signal (an image captured by the cameras).
Description
technical field [0001] The invention relates to the technical field of structured light three-dimensional measurement, in particular to a multi-camera multi-projection structured light fast three-dimensional measurement method based on multipath effect. Background technique [0002] Replacing the human eye with machine vision is the result of the development of computer technology, and it is also the demand of modern manufacturing, especially in the continuous working production line, high-risk (such as pollution) and inaccessible (such as high temperature) environment, it is even more unique. Advantage. For many years, technicians have been exploring 3D imaging technology to obtain the three-dimensional geometric shape of the measured object. The measurement method based on structured light is easy to implement due to its hardware, and has a large range, large field of view, and easy and real-time extraction of light fringe image information. With the characteristics of st...
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CPCG01B11/25
Inventor 伍世虔邓高旭徐正勤郑超兵王洪亮
Owner 苏州费雪克劳德科技有限公司
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