Add preprocessed dataset links

[hugoycj]

Thanks for your excellent work! We have added a link to preprocessed datasets included various conventional surface reconstruction datasets (DTU, BlendedMVS, MobileBrick) as well as some novel view synthetic datasets (nerf_synthetic, nero_synthetic, NSVF_synthetic, refnerf_synthetic). The synthetic datasets encompass challenging scenarios such as low-texture regions, reflective surfaces, and complex geometries. This diverse collection will allow us to thoroughly evaluate the robustness and performance of gaussian-opacity-fields, particularly in handling difficult cases.

The images and ground truth poses for the DTU dataset are obtained from NeuS. For BlendedMVS and MobileBrick, the data is sourced from their respective original repositories: https://github.com/YoYo000/BlendedMVS and https://github.com/ActiveVisionLab/MobileBrick. After extracting the data from these sources, we can directly evaluate the mesh by following the instructions provided in the corresponding original repositories.

[niujinshuchong]

Hi, thanks for the PR. Will try to test it and merge later.