How to recognize a larger object and then some tiny ones in it in a picture?
You can you instance segmentation. Annotate at pixel level the bolts and pins, you can then train Mask RCNN. Hope it helps?
I want to identify the fittings of the transmission line first, and then the micro parts such as bolt and pin. I may have to train a model using tensorflow and will apply in UAV inspection. Any suggestions?(existed or related algorithm/paper/idea) Thanks!!