Command line issue when running MVS in COLMAP

[gesong1982]

Hi @ahojnnes,

I try to run whole COLMAP pipeline by command line shown in the document, SFM part works, but MVS part has a problem. The details show below:

database dir: /home/ubuntu/colmap_test/test/colmap.db
image_dir: /home/ubuntu/colmap_test/test/image (11 images (1.jpg, … , 11.jpg) dimension: 2832 × 2128)
sparse output dir: /home/ubuntu/colmap_test/test/sparse
dense output dir: /home/ubuntu/colmap_test/test/dense

Command line:

./database_creator --General.database_path /home/ubuntu/colmap_test/test/colmap.db

./feature_extractor --General.database_path /home/ubuntu/colmap_test/test/colmap.db --General.image_path /home/ubuntu/colmap_test/test/image --use_gpu 0

./exhaustive_matcher --General.database_path /home/ubuntu/colmap_test/test/colmap.db

./mapper --General.database_path /home/ubuntu/colmap_test/test/colmap.db --General.image_path /home/ubuntu/colmap_test/test/image --export_path /home/ubuntu/colmap_test/test/sparse

./model_converter --input_path /home/ubuntu/colmap_test/test/sparse/0 --output_path /home/ubuntu/colmap_test/test/sparse/points.ply --output_type PLY

./image_undistorter --General.image_path /home/ubuntu/colmap_test/test/image --input_path /home/ubuntu/colmap_test/test/sparse/0 --output_path /home/ubuntu/colmap_test/test/dense --output_type COLMAP --max_image_size 2000

./dense_mapper --workspace_path home/ubuntu/colmap_test/test/dense --workspace_format COLMAP --DenseMapperOptions.max_image_size 0 --DenseMapperOptions.patch_match_filter false --DenseMapperOptions.patch_match_geom_consistency false --DenseMapperOptions.patch_match_num_iterations 4

./dense_fuser --workspace_path /home/ubuntu/colmap_test/test/dense --workspace_format COLMAP --input_type geometric --output_path /home/ubuntu/colmap_test/test/dense/point-cloud.ply

./dense_mesher --input_path /home/ubuntu/colmap_test/test/dense/point-cloud.ply --output_path /home/ubuntu/colmap_test/test/dense/mesh.ply

SFM part works well, I obtain the ply outputs. Only thing is under the ~/sparse folder, there is a subfolder named 0 which includes SFM outputs: cameras.txt images.txt points3D.txt

For MVS part dense_mapper works, got the outputs in ~/dense: dense-reconstruction.sh images sparse stereo. And in ~/dense/stereo/depth_maps: 10.jpg.photometric.bin 1.jpg.photometric.bin 3.jpg.photometric.bin 5.jpg.photometric.bin 7.jpg.photometric.bin 9.jpg.photometric.bin
11.jpg.photometric.bin 2.jpg.photometric.bin 4.jpg.photometric.bin 6.jpg.photometric.bin 8.jpg.photometric.bin

But dense_fuser has problem with the error:


StereoFusion::Options

min_num_pixels: 3
max_num_pixels: 1000
max_traversal_depth: 100
max_reproj_error: 2
max_depth_error: 0.01
max_normal_error: 10

Reading model...
Reading configuration...
Loading image 8.jpgF1207 23:32:15.494607 5177 mat.h:130] Check failed: text_file.is_open() /home/ubuntu/colmap_test/test/dense/stereo/depth_maps/8.jpg.geometric.bin

I check the folder and make sure /home/ubuntu/colmap_test/test/dense/stereo/depth_maps/8.jpg.geometric.bin exists. So could you please help what this error means? Also I try to make sure I used command line with parameters in the correct way.

Thanks

[ahojnnes]

You only ran the dense_mapper once and you specified patch_match_geom_consistency false, but you set --input_type geometric. You have two options:

1. Run the dense_fuser with --input_type photometric (this should work, but it will give sub-optimal results, since you did not filter the depth maps with --DenseMapperOptions.patch_match_filter true in the dense_mapper command).

2. Run the dense_mapper another time with --DenseMapperOptions.patch_match_filter true --DenseMapperOptions.patch_match_geom_consistency true again and then run the dense_fuser with --input_type geometric.

Let me know if you have additional questions and feel free to reopen this issue.