移动终端三维模型快速显示技术研究

发布时间：2018-06-04 07:50

本文选题：移动终端 + 三维模型　；参考：《北京工商大学》2016年硕士论文

【摘要】：随着计算机技术的快速发展以及三维建模技术的日益成熟,三维模型逐渐成为继声音、图像和视频之后的第四代多媒体数据类型。在三维模型迅猛增长的同时,当前的智能手机、平板电脑的硬件性能提高极快,人们对移动终端的图形交互体验有了更多的需求,三维场景的广泛应用也由PC端开始转向移动终端设备。但与高端的图形工作站和桌面PC相比,移动终端的各种资源极为有限,三维模型的显示效率有待提高。对于三维模型在移动终端的显示来说,为了得到逼真的显示效果,视景中往往有上万个多边形,有时多达几百万个多边形,这就对实时显示提出了很高的要求。因此,对于三维模型在移动终端存在的显示问题,降低场景的复杂度也就成了实现实时显示的关键。传统的降低场景复杂度的方法主要有基于场景分块的分割方法、基于可见性消隐的面片剔除方法和基于细节层次模型的显示策略。但是,这些方法都不能有效的解决移动资源的占用问题,基于细节层次模型的方法还大大的提高了内存开销,所以不适合应用在移动终端中。因此,本文针对上述问题展开研究,提出了一个基于图形分类树的三维模型面片生成方法。依据模型的数据库表示形式,抽取其必要的类型和图形信息,将三维模型用图形分类树表示;对交互选择的分类树节点,使用基于离差标准化的方法估算所选节点的模型规模系数;依据规模系数确定模型的显示精度,以此进行三维模型面片的生成。除此之外,针对移动终端的交互和显示特性,根据三维模型浏览的实际需求,设计并定义了多种多点触控交互手势以支持三维模型的浏览。综合上述内容,本文设计并实现了一个移动终端三维模型快速显示系统,能够快速选择模型节点,实现模型的显示和交互浏览,已用于流程工厂模型的漫游以及三维校审。系统的显示效果证明了算法的可行性和有效性。
[Abstract]:With the rapid development of computer technology and the maturity of 3D modeling technology, 3D model has gradually become the fourth generation multimedia data type after sound, image and video. With the rapid growth of 3D models, the hardware performance of current smartphones and tablets has improved rapidly, and people have more demand for the interactive experience of mobile terminals. The wide application of three-dimensional scene is also from PC to mobile terminal equipment. However, compared with high-end graphics workstations and desktop PCs, the resources of mobile terminals are very limited, and the display efficiency of 3D models needs to be improved. For the display of 3D model in mobile terminal, in order to obtain realistic display effect, there are often tens of thousands of polygons in the scene, sometimes as many as millions of polygons, which put forward a very high demand for real-time display. Therefore, for the display problem of 3D model in mobile terminal, reducing the complexity of scene becomes the key to realize real-time display. The traditional methods to reduce the complexity of the scene mainly include the segmentation method based on scene partitioning, the slice removal method based on visibility elimination and the display strategy based on detail hierarchy model. However, these methods can not effectively solve the problem of mobile resource occupancy. The method based on detail hierarchy model also greatly increases the memory overhead, so it is not suitable for mobile terminals. Therefore, in order to solve the above problems, this paper presents a method of creating 3D model surface based on graph classification tree. According to the database representation of the model, the necessary type and graph information are extracted, and the 3D model is represented by the graph classification tree. The method based on deviation standardization is used to estimate the model size coefficient of the selected node, and the display accuracy of the model is determined according to the scale coefficient, which is used to generate the 3D model surface. In addition, in view of the interactive and display characteristics of mobile terminals, according to the actual needs of 3D model browsing, a variety of multi-touch interactive gestures are designed and defined to support the browsing of 3D models. Based on the above, this paper designs and implements a mobile terminal 3D model fast display system, which can quickly select model nodes and realize model display and interactive browsing. It has been used for roaming of process factory model and 3D review. The display effect of the system proves the feasibility and effectiveness of the algorithm.
【学位授予单位】：北京工商大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.41

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