An Efficient Solution to Ray Tracing Problems in Multimedia Photogrammetry for Flat Refractive Interfaces

Abstract Understanding and considering refraction effects are important parts of the demanding task multimedia photogrammetry, especially with planar interfaces, so-called ”flat ports”. Yet, it remains challenging to determine reliable calibration results that both quickly acquired physically interpretable. In this contribution, a novel object-based optimization algorithm, relying on ray tracing methods, is introduced. It enables calibrating physical parameters all involved refractive properties reduced computational effort, compared other standard algorithms in tracing. We show solution produces equally accurate as approaches while improving processing speed by factor approximately ten providing statistical metric object space. Furthermore, we laboratory investigation explicit crucial even orthogonally aligned bundle-invariant interfaces for highest accuracy, accuracy space decreased about 10% implicit calibration. With deviation from orthogonality degrees decreases further almost no useful loss more than 50% results.