Modulation method, device and system for imaging scanning signal synchronization

Abstract

The present application proposes a modulation method, device and system for synchronization of imaging scanning signals, including: transmitting control signals, wherein the control signals include vibrating mirror driving signals, laser scanning signals, and camera exposure signals, and the vibrating mirror driving signals are connected with the camera The exposure signal has the same period and, within the time period of the vibrating mirror driving signal to make the vibrating mirror positively oscillate, the laser scanning signal makes the laser emit N times; the actual signal waveform of the vibrating mirror is measured, and the actual signal waveform is filtered and denoised Obtaining a noise reduction waveform; comparing and detecting the noise reduction waveform with the corresponding control waveform of the galvanometer driving signal to obtain a waveform deviation; adjusting the control signal according to the waveform deviation before transmitting. Compared with the prior art, the modulation method, device and system proposed in this application can simply and intelligently obtain more accurate fringe patterns compared to the results obtained by the prior art.

Description

technical field [0001] The present application relates to the technical field of 3D imaging, and in particular to an imaging scan signal synchronous modulation method, device and system, and a depth image acquisition method and device based on the imaging scan signal synchronous modulation method. Background technique [0002] In the field of 3D imaging, on the one hand, in order to obtain some scene fringe images required for imaging fusion, it is necessary to shoot application scene images projected with striated structured light through the camera; So structured light in the form of a laser scan can show sharper fringes than other forms of light. Therefore, in general, a 3D imaging acquisition system includes a laser for emitting laser light, a galvanometer for refracting the laser light to realize the scanning function so that the laser light is projected into the scene in the shape of stripes, and a camera for shooting scene stripe images. The specific working process ...

AI Technical Summary

Problems solved by technology

Although this technology can solve the problem of inaccurate fringe patterns to a certain extent, because this technology needs to pre-synthesize the scene fringe pattern before using it and also needs to take the actual fringe pattern in advance for comparison and calculation, the process is complicated and the intelligence level is low.

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