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This study showcases the utilisation of OpenCV for extracting features fromphotos of 2D engineering drawings. These features are then employed toreconstruct 3D CAD models in SCAD format and generate 3D point cloud datasimilar to LIDAR scans. Many historical mechanical, aerospace, and civilengineering designs exist only as drawings, lacking software-generated CAD orBIM models. While 2D to 3D conversion itself is not novel, the novelty of thiswork is in the usage of simple photos rather than scans or electronicdocumentation of 2D drawings. The method can also use scanned drawing data.While the approach is effective for simple shapes, it currently does notaddress hidden lines in CAD drawings. The Python Jupyter notebook codesdeveloped for this purpose are accessible through GitHub.

Photo2CAD: Automated 3D solid reconstruction from 2D drawings using OpenCV