The gomatch from dvl-tum

Data prepareation?

Is there any guide about the data prepareation, for example how to process megadepth for training?

How should I prepare my own dataset?

Hello, I have a question, why are the query image and database image processed together during the data preparation stage?
I want to obtain the positioning information of my own data in real time. How should I prepare the data?
Thanks

Data Processing instructions for MegaDepth Option 1 are incomplete.

Just logging some problems I've discovered.

I've been going over the data preparation instructions for megadepth and noticed that Option 1 is not really an option.

gomatch/tools/README.md

Lines 25 to 31 in 3cd031d

 #### Option 1 

 By default the tool assumes there is a folder with the undistorted SfM reconstruction of MegaDepth symlinked to the `data` folder, as explained in the previous section. If the folder is symlinked, theoretically no arguments need to passed. Just call the tool with 

 ``` 

 $ python tools/prep_megadepth_2D3D_data.py 

 ``` 

 After completion, the tool will generate a number of files in `data/MegaDepth_undistort/data_processed/v2`.

If you follow those instructions it will not generate the necessary file that is then required in the follow-up step

gomatch/tools/README.md

Lines 42 to 49 in 3cd031d

 ### Generating a Descriptor Cache 

 Run the tool `tools/extract_features_immatch.py`. 

 ``` 

 python -m tools.extract_features_immatch --immatch_config 'immatch/sift' --dataset 'megadepth' 

 ``` 

 This will generate the descriptor cache for sift.

Our config is looking for

gomatch/configs/datasets.yml

Line 4 in 3cd031d

data_file: "sift_pts/megadepth_2d3d_q500ov0.35tp3-10_imsz.irat1.5.sift1024.npy"

but our generation script would never be able to create that file

gomatch/tools/prep_megadepth_2D3D_data.py

Lines 34 to 37 in 3cd031d

 data_save_path = os.path.join( 

 save_dir, 

 f"megadepth_2d3d_q{args.scene_max}ov{args.overlap[0]}-{args.overlap[1]}covis{topk_min}-{topk_max}.npy", 

 )

the string irat is not even part of the file name construction.

So something got lost during the public release. I'll try to see if I figure out what exactly.

can't find blind_pnp in tools/prep_cambridge_2D3D_data.py

Hi thanks for release your code, i had installed gomatch sucessfully. it occured No module named 'blind_pnp' when i wanted to preprocess the cambridge dataset. so i wonder how to get the module of blind_pnp looking forward to your reply.

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Data prepareation?

How should I prepare my own dataset?

Data Processing instructions for MegaDepth Option 1 are incomplete.

can't find blind_pnp in tools/prep_cambridge_2D3D_data.py

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	#### Option 1
	By default the tool assumes there is a folder with the undistorted SfM reconstruction of MegaDepth symlinked to the `data` folder, as explained in the previous section. If the folder is symlinked, theoretically no arguments need to passed. Just call the tool with
	```
	$ python tools/prep_megadepth_2D3D_data.py
	```

	After completion, the tool will generate a number of files in `data/MegaDepth_undistort/data_processed/v2`.

	### Generating a Descriptor Cache

	Run the tool `tools/extract_features_immatch.py`.

	```
	python -m tools.extract_features_immatch --immatch_config 'immatch/sift' --dataset 'megadepth'
	```
	This will generate the descriptor cache for sift.

	data_save_path = os.path.join(
	save_dir,
	f"megadepth_2d3d_q{args.scene_max}ov{args.overlap[0]}-{args.overlap[1]}covis{topk_min}-{topk_max}.npy",
	)