A calculation method of ar sand table calibration model capable of automatic deviation correction

Abstract

The invention discloses an AR sand table calibration model calculation method capable of automatically correcting deviation. The method comprises the steps that the reference plane model of an AR sandtable is processed; a standard checkerboard pattern is projected by a projector in the sand table; a projection image is collected for calculating to acquire the projection mapping model of the AR sand table; a depth value in the projection mapping model is corrected by the reference plane model to acquire a calibration model. According to the method provided by the invention, in the real-time rendering process of an AR sand table virtual scene, the calibrated reference plane model can automatically correct the inevitable deviation of an RGB-D sensor during an installation process; the projection mapping model can correctly map the raw depth data collected by the RGB-D sensor to the screen space of the projector; and the immersion of the AR sand table interactive experience and an excellent 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 capable of automatic deviation correction. Background technique [0002] Augmented reality (Augmented Reality, referred to as AR), 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 the real image. The world is superimposed on the real world and interacted with. AR technology can provide users with virtual images based on real scenes, enhance users' experience in the real world, and provide immersive new interactive methods. AR sand table is an important landing application of augmented reality technology. The main application scenario is the interactive teaching of interactive courses in early education centers or kindergartens. [0003] The AR sand table obtains the uneven ...

AI Technical Summary

Problems solved by technology

The existing AR sand table calibration model calculation method requires that the RGB-D sensor must strictly "observe" the sand table vertically downwards, which requires high installation accuracy of the sensor. Once the sensor is installed crookedly, the correct calibration model cannot be obtained, and the correct The projection mapping caused by the projection image and the sand is misplaced, it is difficult to achieve an augmented reality immersive experience, and it is impossible to achieve a good teaching effect of entertaining and entertaining

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