Photographers wade through thousands of photos every shoot, and some crops are far from optimal. A smart crop tool can assist these photographers, provide a baseline for them to work from, and automate the crops for many photos.
A good algorithm for finding objects in photos is the YOLO algorithm (You Only Look Once). A pretrained network that works well is the darknet network by Joseph Chet Redmon. This can be imported into Mathematica as a binary file through this code [^1]:
leayReLU[alpha_] := ElementwiseLayer[Ramp[#] - alpha*Ramp[-#] &]