Designing the optimal shutter sequences for the flutter shutter imaging method

Jan Jelinek

doi:10.1117/12.850532

15 April 2010 Designing the optimal shutter sequences for the flutter shutter imaging method

Jan Jelinek

Proceedings Volume 7701, Visual Information Processing XIX; 77010N (2010) https://doi.org/10.1117/12.850532
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Acquiring iris or face images of moving subjects at larger distances using a flash to prevent the motion blur quickly runs into eye safety concerns as the acquisition distance is increased. For that reason the flutter shutter method recently proposed by Raskar et al.has generated considerable interest in the biometrics community. The paper concerns the design of shutter sequences that produce the best images. The number of possible sequences grows exponentially in both the subject' s motion velocity and desired exposure value, with their majority being useless. Because the exact solution leads to an intractable mixed integer programming problem, we propose an approximate solution based on pre - screening the sequences according to the distribution of roots in their Fourier transform. A very fast algorithm utilizing the Jury' s criterion allows the testing to be done without explicitly computing the roots, making the approach practical for moderately long sequences.

Citation Download Citation

Jan Jelinek "Designing the optimal shutter sequences for the flutter shutter imaging method", Proc. SPIE 7701, Visual Information Processing XIX, 77010N (15 April 2010); https://doi.org/10.1117/12.850532

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