Camera and projector calibration system and method

A calibration system and projector technology, applied in the field of calibration systems, can solve problems such as image distortion, low model precision, and inconvenient calibration, and achieve the effect of high precision and model fidelity

Active Publication Date: 2019-05-24
UNRE SHANGHAI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of inconvenient calibration, serious image distortion, and low accuracy of model building in the prior art in the three-dimensional reconstruction of grating projection, and to provide a modeling system that can more accurately obtain projected grating The calibration relationship between the camera and the projector makes the accuracy of the projected grating modeling higher, and the established model is more fidelity. The calibration system and method of the camera and the projector

Method used

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  • Camera and projector calibration system and method
  • Camera and projector calibration system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , this embodiment provides a calibration system for a camera and a projector.

[0033] The calibration system includes a camera 11, a projector 12, a display screen 13 for projection and a processor;

[0034] The processor is respectively connected to the camera and the projector, and the processor sends trigger signals to the camera and the projector respectively;

[0035] The camera includes a camera lens, the projector includes a projection lens, and the shooting direction of the camera lens and the projection direction of the projection lens are both aligned with the display screen;

[0036] The display screen displays a calibration pattern, and the color of the calibration pattern is variable;

[0037] The projector projects a calibration image to the display screen;

[0038] The camera transmits image data to the processor.

[0039] The display screen includes a power supply module and a display panel, the display panel is provided with electrochr...

Embodiment 2

[0060] This embodiment is basically the same as Embodiment 1, the only difference is:

[0061] The display screen includes a translucent whiteboard and a control chip. The calibration pattern is printed on the front of the translucent whiteboard, and several LED lights are arranged on the back of the translucent whiteboard. The translucent whiteboard;

[0062]The control chip is used to control the brightness of the LED lamp;

[0063] The processor is further configured to send a trigger signal to the camera after sending a brightness adjustment signal to the control chip.

[0064] Using the above calibration system, this embodiment also provides a calibration method, including:

[0065] The control chip controls the brightness of the LED lamp;

[0066] After the processor sends a brightness adjustment signal to the control chip, it sends a trigger signal to the camera.

[0067] The processor sends a brightness adjustment signal and then sends a trigger signal to the camer...

Embodiment 3

[0071] This embodiment is basically the same as Embodiment 1, the only difference is:

[0072] The display screen is a liquid crystal display screen, and the liquid crystal display screen displays a preset pattern, the shape of the preset pattern is the same as that of the calibration pattern, and the color of the preset pattern is variable.

[0073] The color of the calibration pattern can be changed by displaying calibration patterns of different colors on the liquid crystal display.

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Abstract

The invention discloses a camera and projector calibration system and method. The calibration system comprises a camera, a projector, a display screen for projection and a processor; the processor isconnected with the camera and the projector respectively, and sends trigger signals to the camera and the projector respectively; the camera comprises a camera lens, and the projector comprises a projection lens; the display screen is used for displaying a calibration pattern, and the color of the calibration pattern is variable; the projector is used for projecting a calibration image to the display screen; the camera is used for transmitting image data to the processor; the processor is used for calibrating the camera; the camera is also used for transmitting calibration data to the processor, and the processor is used for calibrating the camera and the projector. According to the camera and projector calibration system, the calibration relation between the camera and the projector of aprojection grating modeling system can be obtained, the modeling precision of a projection grating is high, and an established model is high in fidelity.

Description

technical field [0001] The invention relates to a camera and projector calibration system and method. Background technique [0002] Three-dimensional reconstruction refers to the establishment of a mathematical model suitable for computer representation and processing of three-dimensional objects. It is the basis for processing, operating and analyzing its properties in a computer environment, and it is also a key technology for establishing a virtual reality that expresses the objective world in a computer. [0003] Three-dimensional reconstruction by grating projection is a three-dimensional reconstruction method. The grating is projected onto the reference plane and the surface of the measured object respectively. Since the reference plane is a horizontal plane, the reference grating projected on it will not be deformed; when the grating is projected onto the measured object When measuring the surface of an object, the grating will have different degrees of deformation, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 袁丹寿孙燕生黄沛杰
Owner UNRE SHANGHAI INFORMATION TECH CO LTD
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