How to make a beautiful display of Thumbnails on WP if they are all different sizes and shapes?

Question

WordPress

There is a store of musical instruments and there are rectangular guitars, vertical and horizontal ones, square drums, and so on.
The customer wants everything to be square, but the usual cropping and regeneration of thumbnails does not work - the guitars are cut off.

From the words of the customer - So that everything is in transparent squares and smooth, but not cut off, but beautiful.

Everything is complicated by the fact that there are about 8000 pictures and each time regeneration takes 3 hours or more.
Tell me how to make it beautiful?

Answer 1

Explain to the customer about the world of miracles and unicorns - this does not happen. Let him hire an editor/designer and have her square the guitars in photoshop.
But there is still a solution - neural networks. But first they need to be trained. And this is thousands of hours of work for programmers.