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Sounds like an "object detection" task. There are various python libraries (i.e. PyTorch, Tensorflow) that work with this sort of thing. You might need to create a training set.

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There's a little more than object detection since I then want individual identification (tell one object of the same type from others).

The keyword for that is instance or panoptic segmentation.

Two ways to do that: 1. Separate classes for each type 2. Object detection, then classification. This is commonly used for street sign identification

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