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High Speed Acquisition of Texture and Optical Property for a 3D object and Application to Preservation of Cultural Heritages

高速获取 3D 物体的纹理和光学特性及其在文化遗产保护中的应用

基本信息

批准号：
14380143
负责人：
KANEKO Toyohisa
金额：
$ 4.54万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Computer Graphics technology has found many applications in such areas as motion pictures, TV programs, and computer gamas. This research is directed toward methods for acquiring textures and optical properties of an existing object on hand.The first method is the one for acquiring textures and mapping on the surface of an object. A hierarchical matching method is proposed. The first stage employs the histogram of the distances to the perimeter from the object center, while the second uses the distance from the center. The third stage employs low-resolution silhouette and the fourth stage uses high resolution silhouette. The resulting time was reduced substantially so that the total time of an object is about three minutes since the time for an image takes 20 to 30 seconds.The second method proposed is on the estimation of camera positions by using texture to texture matching rather than silhouette matching. When mis-registration takes place due to estimation error in camera position, … More a line becomes two lines in the overlapping areas of two camera images. A more exact registration method is proposed that utilizes textures for matching.The third method is concerned with to measure optical reflection properties of the surface of a freeform object. The surface is segmented into regions with the same optical property. A camera is positioned to observe a high light from a region. The optical reflection can be measured based upon a photographic image.Lastly the proposed methods were applied to an important application, preservation of cultural heritages. Toyohashi municipal art museum was contacted and two clay dolls was scanned with a handheld laser scanner. In addition, two Buddizm statues were scanned. A digital camera was used to acquire textures and to measure optical reflection. The corresponding 3D CG models were constructed. It was demonstrated that the resulting CG replicas are useful to preserve cultural heritages which are diminishing due to disasters as fire and earth quakes. Less

计算机图形技术在电影、电视节目和计算机加马斯等领域有着广泛的应用。本研究针对现有物体的纹理与光学性质的撷取方法，第一种是撷取物体表面的纹理与贴图的方法。提出了一种分层匹配方法。第一阶段采用从对象中心到周界的距离的直方图，而第二阶段使用从中心到周界的距离。第三阶段采用低分辨率轮廓，第四阶段使用高分辨率轮廓。由此产生的时间大大减少，因此对象的总时间约为三分钟，而图像的时间需要20至30秒。提出的第二种方法是通过使用纹理到纹理匹配而不是轮廓匹配来估计相机位置。当由于相机位置的估计误差而发生误配准时， ...更多信息在两个照相机图像的重叠区域中，一条线变成两条线。第三种方法是测量自由曲面物体表面的光学反射特性。该表面被分割成具有相同光学特性的区域。摄像机被定位成观察来自区域的强光。最后，将所提出的方法应用于一个重要的应用，即文化遗产的保护。他们联系了丰桥市立美术馆，用手持激光扫描仪扫描了两个泥娃娃。此外，还扫描了两尊佛像。使用数码相机获取纹理并测量光学反射。建立了相应的三维CG模型。结果表明，由此产生的CG复制品是有用的，以保护文化遗产，这是由于火灾和地震灾害减少。少