Geographic grid and image identification combination-based outdoor mobile augmented reality method

Abstract

The present invention relates to the augmented reality field, in particular relates to a geographic grid and image identification combined outdoor mobile augmented reality method. The outdoor mobile augmented reality method comprises the following steps of the outdoor scene area acquisition, the spatial data processing, the geographic grid unit division, the target data acquisition, the image feature point detection and extraction, the spatial quadtree index, the sample database generation, the terminal data acquisition, the image feature generation, the data analysis and matching, the scene information 3D registration and the scene augmented reality display. The outdoor mobile augmented reality method of the present invention can better overcome the influence of the factors during an image identification process, such as the translation, the rotation, the scale zooming, the brightness change, etc., at the same time, by adding the color information in a descriptor, the problem that thegray change similar areas generate the mismatching problem easily is solved, by combining a geographic information technology, the image features having the similar textures can be distinguished according to the positions, by utilizing the division of the geographic grids, the sample point information quadtree indexes are established, and the rapid and accurate matching can be carried out in a mass feature database.

Description

technical field [0001] The invention relates to the field of augmented reality, in particular to an outdoor mobile augmented reality method combining geographic grids and image recognition. Background technique [0002] Augmented reality is a technology that calculates the position and angle of the camera image in real time and adds corresponding virtual information. It integrates image recognition, fusion display, multi-sensor, computer and other disciplines. It builds a bridge between the virtual scene and reality. The bridge, which puts the virtual world on the real world and displays it on the screen for interaction, has been successfully applied to fields such as medical surgery, industrial design, municipal planning, military simulation, education and training, and cultural entertainment. At present, augmented reality has high requirements for input and output devices and computing devices. In recent years, with the rapid development of Internet technology and smart ph...

AI Technical Summary

Problems solved by technology

[0008] 2. Outdoor scenes have problems such as wide space range and large randomness in the recognition process. Coupled with the limited computing and storage capabilities of mobile phones, it is difficult to perform large-scale computing and the efficiency is low.

Images