Score calculation for sketch-based retrieval features is suboptimal for staged querying

[silvanheller]

Currently, when using color sketches for a stage which is not the first one, it is possible that very little results are shown to the user. This is because for large vector distances, the score is bounded to 0 before limiting to the top k results. This means it is possible to enter a sketch-based stage with e.g. 3000 ids and leave it with just 10, even though the config is looking for the top 2500 results.

This has multiple possible fixes: we can adjust maximum distances, change something about correspondence functions or limit before going to correspondence.

[silvanheller]

Will be tackled by @rahelarnold98 and @sauterl in an upcoming project

[lucaro]

I guess this project has concluded, right? Are there any updates on this?

[silvanheller]

From what I gathered, the project and the evaluation ended up going in a direction which did not contribute anything to this specific issue. Maybe @sauterl can correct my impression, or we can coordinate offline.