Convert Photo to STL for CNC

I need a photo converted into an STL file suitable for CNC fabrication. The primary use for the CNC fabricated item is for decorative purposes. The STL file should have medium detail to ensure a balance between quality and production efficiency. Although the material for CNC fabrication was initially not listed, I plan to use foam. the overla size is 12' tall witht the middle being approx 7'

Key Requirements:
- Convert a photo into an STL file.
- Ensure the STL file is suitable for CNC fabrication.
- Focus on medium detail for the design.
- Intended for decorative purposes.

Ideal Skills and Experience:
- Experience in converting images to STL files.
- Proficiency in CAD software for creating detailed designs.
- Knowledge of CNC fabrication processes.
- Familiarity with working on projects intended for decorative purposes.