Python Contour Detection for Card Detection

I'm in need of a highly skilled Python developer with specific experience in contour detection. The challenge is to write efficient code that successfully detects contours of geometric shapes within complex image scenes.

- The code must be written in Python, leveraging libraries and techniques most suited for contour detection and shape recognition.
- It needs to be optimized to identify and isolate geometric shapes, particularly in the context of recognizing playing cards within an image containing multiple cards.
- Upon successful contour detection, the code should output card images extracted from the original image, hence experience in image processing is highly required.

Ideal candidates will have a strong background in Python, image processing and computer vision. Proven experience with projects that require contour detection is a big plus. Please provide examples of similar work in your bid.