Checkerboard-pattern-based calculation method of AR sand table calibration model

A technology for calibrating models and calculation methods, applied in the field of AR sand table projection mapping, which can solve problems such as cumbersome operation process, error-prone, and low calibration accuracy

Active Publication Date: 2018-08-28
杭州映墨科技有限公司
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AI Technical Summary

Problems solved by technology

The existing AR sand table is mainly based on disc detection to build a calibration model for projection mapping. The operation process is cumbersome and error-prone, and the calibration accuracy is not high. It is difficult to achieve correct projection mapping and good entertaining teaching. Effect

Method used

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  • Checkerboard-pattern-based calculation method of AR sand table calibration model
  • Checkerboard-pattern-based calculation method of AR sand table calibration model
  • Checkerboard-pattern-based calculation method of AR sand table calibration model

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specific Embodiment

[0056] The AR sandbox used in this embodiment is as figure 1 shown. The specific working process during actual operation is that the projector projects the virtual image onto the uneven sand surface to achieve an augmented reality experience, and the RGB-D sensor obtains the height information of the uneven sand in the sand table, which is used for 3D reconstruction by the computer , sand is the medium for superimposing virtual images in the real world, and the virtual images can change in real time according to changes in the height of the sand.

[0057] 1. The basic information of the AR sand table is obtained in the following ways:

[0058] 1) Use sand to pile up a highest point in the AR sand table, and dig a lowest point, and mark the boundary of the sand table in the RGB image collected by the RGB-D sensor;

[0059] 2) After confirming that it is correct, record the pixel coordinate values ​​(x 1 ,y 1 ), (x 2 ,y 2 ), respectively (116,128), (492,433), and record th...

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Abstract

The invention discloses a checkerboard-pattern-based calculation method of an AR sand table calibration model. Processing is carried out to obtain basic information of an AR sand table; a projector isused for projecting a standard checkerboard pattern at the sand table; and a projection image is collection and computing processing is carried out on the image to obtain a calibration model of the AR sand table. The method is operated simply and conveniently; and a precise calibration model can be obtained stably. The obtained calibration model is able to map original depth data collected by anRGB-D sensor to screen space of the projector correctly in real time during the real-time rendering process of the virtual scene of the AR sand table, so that the good immersion effect of the interactive experience of the AR sand table and the good user experience are ensured.

Description

technical field [0001] The present invention relates to an AR (Augment Reality, Augmented Reality) sand table projection mapping method, in particular to an AR sand table calibration model calculation method based on a checkerboard pattern. Background technique [0002] With the release of Google Glass in April 2013, the concept and technology of Augmented Reality (AR) has received more and more attention in recent years. Simply put, augmented reality technology is a technology that calculates the position and angle of the camera in real time, so as to superimpose reasonable images, videos or 3D models on real images. This technology can provide users with virtual images based on real scenes, enhance users' real-world experience, and provide immersive new interactive methods. Augmented reality technology is considered to be a revolutionary technology because it completely subverts the existing human-computer interaction methods. AR sand table is an important landing applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 郭云东王欣捷吴震
Owner 杭州映墨科技有限公司
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