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Structured light three-dimensional measurement method based on event camera

A technology of three-dimensional measurement and structured light, which is applied in the direction of measuring devices, optical devices, image analysis, etc., can solve the problems of complex calibration, scanning repeatability change, calibration parameter failure, etc., to achieve simple system, reduce pressure, and increase scanning speed Effect

Active Publication Date: 2021-03-19
浙江知象光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calibration of this kind of system is complicated, and at the same time, the line scanning system is easily affected by changes in temperature, air pressure, etc., which makes the repeatability of its scanning change, which in turn leads to the failure of calibration parameters.

Method used

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  • Structured light three-dimensional measurement method based on event camera
  • Structured light three-dimensional measurement method based on event camera

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Experimental program
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Embodiment Construction

[0052] The invention utilizes a novel event camera to perform efficient three-dimensional reconstruction using event streams containing structured light information. In order to achieve the purpose of the invention, this program provides the following example technical solutions:

[0053] (1) Construction of a structured light 3D measurement system based on event cameras

[0054] System structure such as figure 1 As shown in , a projector for projecting linear structured light consists of a laser, a focusing lens and a cylindrical mirror. After the beam emitted by the laser is focused, it is incident on the cylindrical mirror, and then the point laser is shaped into a line laser, and then projected onto the surface of the object. The event camera (hereinafter referred to as the camera) shoots from another angle, and the intersecting optical axis is placed between the two, and the angle between the optical axes is set within 30°. The camera selects a lens with an angle of vi...

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Abstract

The invention discloses a structured light three-dimensional measurement method based on an event camera. The method comprises the following steps: constructing a structured light three-dimensional measurement system based on the event camera; calibrating a structured light measurement system; projecting structured light, and collecting and obtaining event streams; and performing three-dimensionalreconstruction by utilizing the event flow. The scanning speed is increased; and compared with a traditional method, the method has the advantage that the scanning efficiency can be improved by dozens of times. Point and line structured light usage scenarios can be expanded. According to the method, the pressure on hardware is reduced, and the cost of the system is reduced. The system power consumption is reduced. According to the method, less information needs to be processed in the aspects of reading, transmission and processing, so that the power consumption can be effectively reduced.

Description

Technical field: [0001] The invention relates to a structured light three-dimensional imaging method based on an event camera, which mainly uses structured light to cooperate with event information of an event camera to carry out efficient three-dimensional reconstruction, and belongs to the field of optical three-dimensional measurement. Background technique: [0002] Traditional structured light can be divided into point structured light, line structured light and surface structured light according to the form of structured light. The classic point structured light projects a single point of light on the surface of the object, and the line structured light projects a single line on the surface of the object, and then captures the structured light information from another angle, and then analyzes and calculates the depth information from the image. Although the efficiency of point structured light and line structured light is much lower than that of surface structured light...

Claims

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Application Information

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IPC IPC(8): G01B11/25G06T7/80G06T17/20
CPCG01B11/25G06T7/80G06T17/20
Inventor 杨涛彭磊马力李晓晓李欢欢周翔
Owner 浙江知象光电科技有限公司
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