SiameseDataGenerator should be tolerant of poorly formatted input data

[MekWarrior]

The tracking data generator should log and throw a custom error when data is poorly/incorrectly formatted. Ideally, it should be fault tolerant. At minimum it should throw an exception and fail on purpose.

[willgraf]

I would like to close this issue as the SiameseDataGenerator already checks for:

• Parent cell is in the last frame
• All batches contain one cell
• Missing daughters information

I think that these validations are sufficient, even though they do not validate all of the daughter data. Because we do not do label validation for instance segmentation models, I do not see why we need to validate the lineage data here in the data generator.

I could see a use for this in deepcell-tracking though.

[willgraf]

I'm going to close this issue as the SiameseDataGenerator does do some validation, but full .trk or lineage.json validation should live in deepcell-tracking. This is now being tracked in vanvalenlab/deepcell-tracking#51.