1. A method for determining, if an object has split, whether the object should be classified into multiple objects, comprising: creating a fission model that tracks a tendency of the object to include multiple non-contiguous regions; tracking, in association with the object, a region that is in close proximity with the object; accumulating, based on the fission model, evidence that the region and the object should be separate; making, based on the accumulated evidence, a determination that the region and the object should be classified into multiple objects; creating, based on a positive determination, a temporal association for each of the region and the object; assigning, based on the positive determination, a track history to the temporal association of at least one of the region or the object; and tracking the region and the object as separate objects.