Difficulty registering image despite high point correspondence

[Davidyao99]

Describe the bug
I am trying to run the colmap mapper stage to generate sparse reconstruction using my own customized feature matching. I followed the script here to write my own correspondence into the database.

When running the colmap mapper command, there seems to be a lot of difficulty registering the images. Eventually, colmap throws a failed to create sparse model error. I used the colmap gui to visualize the images / matches and it seems right.

My correspondence should be quite sufficient, and based on the output, it seems like the images have a fair amount of overlap. I am not sure why the image is not registering. I am using the default settings for colmap mapper. This is my command:

sparse_reconstruction_command = [
            "colmap", "mapper",
            "--database_path", os.path.join(output_path, "database.db"),
            "--image_path", image_path,
            "--output_path", os.path.join(output_path, "sparse")
        ]

[jaco001]

If your dataset is too detailed, try rescaling it. I've usually had the best results with around 500-1000 points (IMHO).

[Davidyao99]

@jaco001 I see, are you suggesting to cut down on the number of correspondences between pairs of images?

[jaco001]

It is harder for Colmap to spot similarities in 20,000 points than in 1,000 points.