Single image method to depict 3D profiles

摘要

A method to reliably extract object profiles even with surface discontinuities (that leads to 2nπ phase jumps) is proposed. Proposed method uses an amplitude modulated Ronchi grating, which facilitates one to extract phase and unwrap the same with a single image. Ronchi equivalent image can be derived from modified grating image, which aids in extracting wrapped phase using Fourier transform profilometry. Amplitude of the modified grating aids in phase unwrapping. As we only need a projector that projects an amplitude-modulated-grating, proposed method facilitates one to extract 3D profile without using full video projectors.