Publication: Improving Early Navigation in Time-Lapse Video with Spread-Frame Loading

Time-lapse videos are often navigated by scrubbing with a slider. When networks are slow or images are large, however, even thumbnail versions load so slowly that scrubbing is limited to the start of the video. We developed a frameloading technique called spread-loading that enables scrubbing regardless of delivery rate. Spread-loading orders frame delivery to maximize coverage of the entire sequence; this provides a temporal overview of the entire video that can be fully navigated at any time during delivery. The overview initially has a coarse temporal resolution, becoming finer grained with each new frame. We compared spread-loading with traditional linear loading in a study where participants were asked to find specific episodes in a long time-lapse sequence, using three views with increasing levels of detail. Results show that participants found target episodes significantly and substantially faster with spread-loading, regardless of whether they could click to change the load point. Users rated spread-loading as requiring less effort, and strongly preferred the new technique.

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Participants

Carl Gutwin
University of Saskatchewan
Michael van der Kamp
Md. Sami Uddin
University of Saskatchewan
Kevin Stanley
Ian Stavness
University of Saskatchewan
Sally Vail

Citation

Gutwin, C., van der Kamp, M.J., Uddin, M., Stanley, K., Stavness, I., Vail, S. 2019. Improving Early Navigation in Time-Lapse Video with Spread-Frame Loading. In Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI 2019), Glasgow, Scotland UK. 12 pages. DOI=10.1145/3290605.3300785.

BibTeX

@inproceedings {537-Timelapse_CHI2019-CRcopy,
author= {Carl Gutwin and Michael van der Kamp and Md. Sami Uddin and Kevin Stanley and Ian Stavness and Sally Vail},
title= {Improving Early Navigation in Time-Lapse Video with Spread-Frame Loading},
booktitle= {Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI 2019)},
year= {2019},
address= {Glasgow, Scotland UK},
pages= {12 pages}
}