3D Photogrammetric-Data for WK03-09

Research data (*.las, *.ply and *.obj format) which was obtained by Photogrammetric/Computer Vision 3D digitization as well as original images which were the base for the 3D reconstruction process. Explanation about the 3D data format: Las (Is the normal data format for laser scanned point cloud data and also for photogrammetric 3D model.) Ply or Ply + jpg (The software RealityCapture encoded texture mesh in a single ply file while the software Agisoft metashape exported textured mesh in ply format + .jpg.) Obj + mtl + jpg (Obj stores a texture mesh together with mtl and jpg file. Obj file contains information of geometric vertices, texture vertices, vertex normal, polygon face element etc. The Mtl file defines the texture information of the faces. Mtl normally refers to a jpg for storing the actual texture.) Explanation about the mask image (if available): To avoid lots of background information in the 3D reconstruction process, well-aligned images to generate a rough model were applied. Afterwards a mask for each image could be calculated according to the 3D model. In the next step, original images together with the corresponding masks are applied to implement the reconstruction, which is free from the influence of the background information. This dataset is part of the digital gyroscope collection. For more information about the collection and its creation, please see the documentation dataset: Niklaus, Maria, 2021, "Information about the Gyrolog data repository", doi: 10.18419/darus-821, DaRUS.To refer to the whole collection: Wagner, Jörg F.; Ceranski, Beate; Fritsch, Dieter; Mammadov, Gasim; Niklaus, Maria; Schweizer, Timo; Simon, Sven; Zhan, Kun, 2021, "Digital Gyroscope Collection Created by the Project 'Gyrolog'", doi: 10.18419/darus-gyrolog, DaRUS.

本数据集包含通过摄影测量/计算机视觉三维数字化技术获取的研究数据（格式为*.las、*.ply及*.obj），以及作为三维重建流程基础的原始影像。三维数据格式说明如下：LAS格式（LAS）是激光扫描点云数据及摄影测量三维模型的标准数据格式；PLY格式（PLY）或PLY+JPG格式（JPG）中，RealityCapture软件会将带纹理网格编码至单个PLY文件内，而Agisoft Metashape软件则将带纹理网格导出为PLY格式搭配*.jpg文件；OBJ格式（OBJ）+MTL格式（MTL）+JPG格式（JPG）下，OBJ文件可存储带纹理网格并配套MTL与JPG文件，其中OBJ文件包含几何顶点、纹理顶点、顶点法线、多边形面元素等信息，MTL文件用于定义面的纹理属性，通常会关联JPG文件以存储实际纹理数据。掩码图像（mask image）说明（若有提供）：为避免三维重建流程中引入过多背景信息，首先使用对齐良好的影像生成粗略模型，随后可基于该三维模型为每张影像计算对应的掩码。后续将原始影像与其配套的掩码一同用于重建流程，即可消除背景信息的干扰。本数据集属于数字陀螺仪数据集集合的一部分。如需了解该数据集及其构建的更多详情，请参阅以下文献数据集：Niklaus, Maria, 2021, 《Gyrolog数据存储库信息》, doi: 10.18419/darus-821, DaRUS。如需引用完整数据集，请使用以下著录信息：Wagner, Jörg F.; Ceranski, Beate; Fritsch, Dieter; Mammadov, Gasim; Niklaus, Maria; Schweizer, Timo; Simon, Sven; Zhan, Kun, 2021, 《项目“Gyrolog”构建的数字陀螺仪数据集》, doi: 10.18419/darus-gyrolog, DaRUS。