3D Photogrammetric-Data for KH07-09

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。关于三维数据格式的说明如下：LAS格式是激光扫描点云数据及摄影测量三维模型的通用标准数据格式；PLY格式或PLY+JPG组合：RealityCapture软件将纹理网格编码至单个PLY文件中，而Agisoft Metashape软件则将带纹理的网格导出为PLY格式文件及配套JPG文件；OBJ+MTL+JPG组合：OBJ文件用于存储纹理网格的相关信息，配套MTL与JPG文件共同构成完整的纹理网格数据。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文件定义网格面的纹理属性，通常关联JPG文件以存储实际的纹理图像数据。关于掩码图像（若有提供）的说明：为避免三维重建流程中引入过多无关背景信息，首先使用配准良好的影像生成粗略三维模型，随后基于该模型为每张原始影像计算对应的掩码图像。后续将原始影像与配套的掩码图像一同用于重建流程，即可有效消除背景信息对重建结果的干扰。本数据集为数字陀螺仪数据集集合的组成部分。如需了解该集合及其构建的详细信息，请参阅数据集文档：Niklaus, Maria, 2021, "Information about the Gyrolog data repository", doi: 10.18419/darus-821, DaRUS。如需引用该完整数据集集合，请参考：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。