Rolling shutter camera synchronization with sub-millisecond accuracy

Autoren Matej Smid
Jiri Matas
Editoren
Titel Rolling shutter camera synchronization with sub-millisecond accuracy
Buchtitel Proceedings of the 12th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2017)
Typ in Konferenzband
Verlag Scitepress
Serie VISAPP
Band 4
ISBN 978-989-758-225-7
DOI 10.5220/0006175402380245
Monat February
Jahr 2017
Seiten 238-245
SCCH ID# 17029
Abstract

A simple method for synchronization of video streams with a precision better than one millisecond is proposed. The method is applicable to any number of rolling shutter cameras and when a few photographic flashes or other abrupt lighting changes are present in the video. The approach exploits the rolling shutter sensor property that every sensor row starts its exposure with a small delay after the onset of the previous row. The cameras may have different frame rates and resolutions, and need not have overlapping fields of view. The method was validated on five minutes of four streams from an ice hockey match. The found transformation maps events visible in all cameras to a reference time with a standard deviation of the temporal error in the range of 0.3 to 0.5 milliseconds. The quality of the synchronization is demonstrated on temporally and spatially overlapping images of a fast moving puck observed in two cameras.