Artifacts far from the object for dino sparse ring

[drewm1980]

I was able to get a successful reconstruction with:

Ubuntu 14.04 GTX Titan X Dino Sparse Ring gipuma 7c6056b2ec0de742fa5c7608bc367fce37f76bc0 fusible 4646d91a2ac3fc7b4fa85292aaf31fa1f18f66e4 Debug build configuration

However, there are some major artifacts very far from the dino in one specific direction:

This seems likely to be a coding error, rather than a bad heuristic or something, since the camera positions are more or less symmetric. Perhaps there is a gap in the detection of the ring topology or something?

[drewm1980]

It turned out this was caused by:

1. Running the gipuma example script without fusible compiled yet
2. Compiling fusible
3. Re-running the example script

If you instead:

1. Compile BOTH gipuma and fusible
2. Run the example script

You get a cloud without the big artifact.

This indicates that gipuma's intermediate output depends (probably trivially) on whether fusible is installed and therefore, this bug should be filed against gipuma.