Scale bar errors of cold-water coral 3D reconstructions from three different setups@en

For accurate 3D photogrammetric measurements of corals under laboratory conditions, two prototypes (Azores 3D system and Barcelona 3D system) and a final setup (Coruña 3D system) were presented. These setups were designed to obtain a complete set of images of a coral in an aquarium and create accurate 3D reconstructions. A total of 24 (Azores), 177 (Barcelona) and 120 (Coruña) 3D reconstructions of cold-water corals were used to evaluate the systems. The effectiveness of the three systems was assessed by taking into account the total scale error of the 3D reconstructions. The total scale error is the difference between the input scale bar lengths and the measured distance between two-point markers. Here, we provide the total scale error from every reconstruction of each system.为开展实验室环境下冷水珊瑚的高精度三维摄影测量工作，本研究提出了两款原型系统（亚速尔3D系统（Azores 3D system）与巴塞罗那3D系统（Barcelona 3D system））以及一套最终定型装置（拉科鲁尼亚3D系统（Coruña 3D system））。上述装置均用于采集水族箱内单株珊瑚的完整图像数据集，并生成高精度三维重建模型。本研究共使用24组由亚速尔3D系统生成、177组由巴塞罗那3D系统生成、120组由拉科鲁尼亚3D系统生成的冷水珊瑚三维重建结果，对三款系统开展性能评估。三款系统的有效性通过三维重建的总尺度误差指标进行评估。总尺度误差指的是预设标尺杆长度与两点标记物的实测距离之间的差值。本数据集提供了各系统所有三维重建结果对应的总尺度误差数据。