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Some questions about ba

Open li1u opened this issue 8 months ago • 1 comments

Excuse me, I noticed that you used triangulated feature points when performing BA optimization in vggsfm. I want to know why the triangulated points are not in the same position as the point cloud obtained by the original vggt. Did you do anything with the depth? I migrated the BA process of vggsfm to vggt, using the camera parameters predicted by vggt as the initial values ​​and the points extracted by sift as feature points.

li1u avatar Apr 11 '25 01:04 li1u

Hi, I am a little confused about this question. Could you explain it in detail?

jytime avatar Apr 12 '25 06:04 jytime

Processing non visible frames: [4] Not enough inliers per frame, skip BA. Traceback (most recent call last): File "D:\PYCHARM\PyCharm 2024.1\VGGT\vggt-main\demo_colmap.py", line 297, in demo_fn(args) File "D:\PYCHARM\PyCharm 2024.1\VGGT\vggt-main\demo_colmap.py", line 186, in demo_fn raise ValueError("No reconstruction can be built with BA") ValueError: No reconstruction can be built with BA

Hello, when I was running the following code, I encountered the aforementioned issue. Could you please advise on how to solve it? Thank you for your response. python demo_colmap.py --scene_dir="D:/3dstruction/SparseRecon/SparseRecon/vggt/examples/room/" --use_ba --max_query_pts=2048 --query_frame_num=5

xujunjiejerry avatar Dec 08 '25 01:12 xujunjiejerry