Development of Archiving, Storing and Presenting Method for Virtual Exhivition at Digital Libraly

一种图书三维信息归档方法的开发：首先，开发了一个应用系统，该系统从水平放置的图书表面存档的数字图像、来自废纸弯曲和旋转的全局表面信息和精确的三维信息。在使用光度立体方法时，存在以下问题：(1)不能将纸张表面的光学特性近似为完全散射面。(2)在页面边界处，由于多次反射、阴影等因素的影响，无法解决这一问题。为此，提出了一种新的获取更好的三维信息的方法。开发了一种从图书中获取高分辨率信息的方法：目前数码相机的分辨率约为2000像素×2000像素，因此当归档较宽的图书时，无法获得足够的分辨率。为此，本文提出了一种组合多幅图片的方法，即对于重叠的区域，采用立体匹配法获取三维信息，对于其他区域，则通过对先前方法得到的上下两个三维信息进行内插来获取三维信息。这种方法与数字化字符时的方法基本相同。提出并发展了涂料强度模型。该方法具有较强的稳健性，古籍表面的反射特征多种多样，包括较小的三维方差。这种方法是基于当时的涂料种类很少，从化学原因来看，几乎没有叠层涂料。该方法考虑了这些性质，取得了较好的效果。

Development of a method for archiving of 3-dimensional information from Book :At first, an application system is developed, which gets from digital image archived from the book surface located horizontal, a global surface information and precise 3-D information coming from bending and rotation of used paper. It has many problems when using photometric stereo method that(1) It can not be approximated that optical characteristic of paper surface is complete scattering surface.(2) It can not be solved the problem because of influence of multi-reflection, shadow and so on, at the boundary between pages.So a new method to get better 3-D information has been developed.Development of a method for archiving high-resolution information from book :Currently the resolution of digital camera is approximately 2000 pixel by 2000 pixel, so when archiving wider book, it can not be gotten sufficient resolution. So, a method to combine gotten several separated pictures, has been developed,The method is that, for the overlapped region, stereo matching method is applied for getting 3-D information and for other region, the 3-D information is gotten by interpolating from uper and lower 3-D information which are gotten previous method.Development of a method for archiving from picture in the book :At last, a method for digitizing pictures in the book, has been developed. The method is basically the same as when digitizing characters. The paint-strength model is proposed and developed. This method is robust for that, the reflection characteristics of the surface of the rare book are various, including small 3-D variance. This method is based on the facts that at that time there were only few kind of paints and from the chemical reason there were few overlaid painting. The method is concerned such properties, and gets better results.