基于灰度值编码的三维轮廓数据表示方法  

Three-Dimensional Profile Data Representation Based on Gray Value Encoding

作　　者：张绍泽[1] 张建奇[1] 黄曦[1] 刘德连[1] 

机构地区：[1]西安电子科技大学物理与光电工程学院,陕西西安710071

出　　处：《中国激光》2015年第12期239-247,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(61301290)

摘　　要：近年来,在线三维数字博物馆成为文物保护和资源共享的新兴手段,但是使用三维扫描技术获得的三维轮廓数据体积较大,不便于三维数字博物馆数据的实时加载与显示。针对该问题,提出了一种基于灰度值编码的三维轮廓数据表示方法。在虚拟条纹投影系统的基础上,根据虚拟照相机水平方向分辨率将灰度值编码为8位灰度图像或者8位灰度图像和二值图像,并将其作为投影图像进行投影。使用虚拟照相机对发生形变的投影图像进行拍摄,实现三维轮廓数据的图片表示。实验结果表明,与传统的三维数据格式相比,提出方法所需的数据加载及显示时间减少了98%以上,非常适合基于三维轮廓数据数字博物馆的数据实时加载与显示。Recently, the online three-dimensional（3D） digital museum is becoming an emerging method for the protection and resource sharing of the heritage. However, the size of 3D profile data obtained by 3D scanning techniques is too large for 3D digital museums to properly load and display in real time. To solve this problem, a representation method of 3D profile data based on gray value encoding is proposed. On the basis of the virtual fringe projection system, the gray values are encoded into an 8 bit gray image or an 8 bit gray image along with a binary image according to the resolution of the virtual camera in the horizontal direction, and then the images are projected as projection fringes. By utilizing the virtual camera to capture the projection fringes that have been distorted, 3D profile data are represented as images. The experimental results show that the loading and display time of the data within the proposed method is reduced by more than 98% compared with the traditional 3D data format, and it is very suitable for the real-time loading and display of digital museums based on 3D profile data.

关 键 词：信号处理 三维轮廓数据压缩 灰度值编码 虚拟条纹投影系统 三维数字博物馆 

分 类 号：O438[机械工程—光学工程]