Digital-city-model-based virtual roaming method for achieving lossless data interaction at display end based on

Abstract

The invention relates to technical field of computer vision and discloses a digital-city-model-based virtual roaming method for achieving lossless data interaction at a display end. The digital city virtual roaming method has the advantages that massive-byte lossless data interaction between a background database and the front display end can be achieved, that is to say, digital city viewing angleimage data collected according to different viewing points and sight lines is stored in the background database, operation processing such as real-time rendering does not need to be performed on three-dimensional virtual scenes at a background server or the front display end during virtual roaming, and corresponding viewing angle image data can be transmitted from the background database to the front display end for display in a lossless manner only by appointing viewing points and viewing angles; due to the fact that the collected original data does not need to be reduced in the whole process, the original data representing physical detail information can be retained in the display data, and visual output timeliness and accuracy are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of computer vision, and in particular relates to a virtual roaming method for realizing data lossless interaction on a display terminal based on a digital city model. Background technique [0002] Computer vision technology (Computer Vision, CV for short) is one of the most popular researches at present. It becomes an image that is more suitable for human eyes to observe or sent to the instrument for detection. It is a multidisciplinary study covering computer science (graphics, algorithms, theoretical research, etc.), mathematics (information retrieval, machine learning), engineering (robotics, NLP, etc.), biology (neural science) and psychology. Science (cognitive science), etc. [0003] Digital city refers to the use of spatial information to build a virtual platform to obtain and upload urban information related to urban natural resources, social resources, infrastructure, humanities, economy, etc. in ...

AI Technical Summary

Problems solved by technology

[0005] In the current virtual roaming output mode of architectural scenes, most companies still generally use WebGL (that is, WebGraphics Library, which is a 3D drawing protocol. This drawing technology standard allows JavaScript and OpenGLES 2.0 to be combined together. A JavaScript binding that can provide hardware 3D accelerated rendering for HTML5Canvas, so that Web developers can use the system graphics card to display 3D scenes and models more smoothly in the browser, and create complex navigation and data visualization) technology, Although it saves the trouble of developing a special rendering plug-in for web pages, it can be used to create website pages with complex 3D structures, and even to design 3D web games, etc., but it will cause the loss of detailed data and serious problems of model beveling At the same time, because the light and dark layers represented by material diffuse reflection, high light, normal bump map and opacity are used to replace physical details, it has a certain visual deception, resulting in the accuracy of the work is only at the game level, and cannot be applied to holographic interactive scenes. In particular, it cannot be used in the field of digital protection engineering for monuments or ancient building sites, etc.

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