Jigsaw Puzzle Corner Piece Detection

I'm looking for an expert in Python who can assist me with detecting corner pieces in a jigsaw puzzle. The preferred method for this project is image processing.

Key Skills:
- Proficiency in Python
- Expertise in image processing
- Experience with jigsaw puzzles preferred

Your main task will be to implement an image processing technique in Python to identify the corner pieces of a jigsaw puzzle. Please provide examples of similar projects you've completed in the past.

I want to extract piece of puzzle from bg.png. and show extracted piece of puzzle like pi.jpg