[rustastra]

I am very curious to know which pre-trained models work better for this task and whether it's possible at all to do without a neural net...

[elandau25]

Really just depends on the task. For this particular case I used a Faster-RCNN model with weights pretrained on the COCO dataset

[rustastra]

Could feature extraction be helpful here?

[elandau25]

Feature extraction from a pre-trained model? Sure, again depends how you use it. We have used feature extraction + clustering for some of these labelling tasks successfully in the past.