how to generate "dust3r_{str(extra_opts.sparse_view_num)}_test.json" for render and evaluate gaussianobject with dust3r (CF-GaussianObject) under test pose? ?

[flowingithub]

[chensjtu]

Since the pose from Dust3r is not aligned with the GT pose from COLMAP, we employ gradient descent for the final metrics measurement. Details can be found in Appendix A.2.