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A projection type augmented reality image generation method and system

A technology of augmented reality image and generation system, which is applied in the field of projected augmented reality image generation, and can solve problems such as image feature extraction and object recognition difficulties

Active Publication Date: 2020-04-28
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the projected augmented reality system, it is usually necessary to use the camera to collect images of the real scene for identification, tracking or monitoring. At this time, the camera will also collect the projected image, which makes image feature extraction and object recognition difficult.

Method used

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  • A projection type augmented reality image generation method and system
  • A projection type augmented reality image generation method and system
  • A projection type augmented reality image generation method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0070] A projection type augmented reality image generation method, comprising the following steps:

[0071] Start to collect, the processing unit 10 starts to collect the real scene image taken by the photography unit 20, and at the same time sends an all-black picture to the projection unit 30, so that the projection unit 30 does not emit light;

[0072] Generate a virtual scene in the processing unit 10 by taking the real scene image, convert the projected picture into a 3D model and place it in the virtual scene;

[0073] For projection transformation, an augmented reality image is generated through the 3D model and sent to the projection unit 30, and the projection unit 30 projects the augmented reality image to be superimposed on the real scene.

[0074] In this embodiment, the projected image is not displayed during the acquisition process through a simple and practical method.

Embodiment 2

[0076] A projection type augmented reality image generation method, comprising the following steps:

[0077] To prepare for acquisition, the processing unit 10 sends an instruction to start acquisition to the control unit 40, and the control unit 40 controls the switch unit 50 to close after receiving the instruction, blocking the image emitted by the projection unit 30;

[0078] To collect a real scene, the control unit 40 controls the switch unit 5 to turn off and off, and at the same time, the control unit 40 sends a feedback signal to the processing unit 10, and the processing unit 10 starts to collect the camera unit after receiving the feedback signal. 20 Real scene images shot;

[0079] After the acquisition is completed, the processing unit 10 sends a control instruction to the control unit 40, and the control unit 40 controls the switch unit 5 to open to open the projection unit 30;

[0080] Generate a virtual scene in the processing unit 10 by taking the real scene ...

Embodiment 3

[0083] This embodiment proposes a specific method of projection transformation based on the above-mentioned embodiment 1 or embodiment 2, so that the projection scene can change the virtual viewing angle with the change of the operator's position. The steps of the projection transformation are as follows:

[0084] Establish the camera unit coordinate system (xc-yc-zc) and the projection plane coordinate system (xw-yw-zw), and obtain the transformation matrix R that transforms the camera unit coordinate system into the projection plane coordinate system. The transformation matrix R defines two There are many ways to obtain the azimuth transformation relationship between coordinate systems. For example, by using the identification card, the coordinate system of the identification card coincides with the projection plane coordinate system, and the matrix R can be obtained through the existing computer vision processing algorithm;

[0085] Utilize the photographing unit 20 to captu...

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Abstract

The present invention relates to a projection-type augmented reality image method and system, and the method comprises the following steps: starting acquisition: a computer starts to collect real scene images captured by each of the cameras, and simultaneously transmits a full black image to a projector so that the projector does not emit light; generating a virtual scene in the computer through the captured real scene image, converting the projected picture into a 3D model and placing the 3D model in the virtual scene; performing the projection transformation: generating an augmented realityimage through the 3D model and transmitting the augmented reality image to the projector, and enabling the projector to project the augmented reality image to be superimposed into the real scene. According to the invention, the black image is transmitted to a projection unit in the acquisition process, so that the projection unit does not emit light, and does not affect the process of image acquisition. The structure is simple and the cost is low.

Description

technical field [0001] The invention relates to a projection type augmented reality image generation method and system, belonging to the field of augmented reality technology. Background technique [0002] The projected augmented reality system uses a projector to directly project and superimpose the three-dimensional graphics generated by the computer on the real scene, so that the operator can see a virtual and real scene. The projected augmented reality system has application prospects in industrial production, games, entertainment and other fields. In a projected augmented reality system, it is usually necessary to use a camera to collect images of real scenes for identification, tracking or monitoring. At this time, the camera will also collect projected images, which makes image feature extraction and object recognition difficult. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a proj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/204H04N13/275H04N13/296H04N13/106H04N13/117H04N13/194H04N13/363H04N9/31
CPCH04N9/3141
Inventor 陈成军邵晶李东年洪军
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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