Hi @mattbev
Welcome to the PyTorch community!
You can consider object counting datasets, the idea is that object counting can be formulated as a regression problem. Here are some links:

Visual Geometry Group - University of Oxford 1
Object Counting | Papers With Code 1
[2008.12470] Counting from Sky: A Large-scale Dataset for Remote Sensing Object Counting and A Benchmark Method 1
Crowd Counting | Kaggle 3
http://visal.cs.cityu.edu.hk/static/pubs/conf/cvpr08-peoplecnt.pdf

Hope this helps!