Our work on Sketcholution, a visualization of sketch histories, has just been accepted for publication in the International Journal of Human-Computer StudiesHere is the paper abstract:

We present Sketcholution, a method for automatically creating visual histories of hand-drawn sketches. Such visual histories are useful for a designer to reflect on a sketch, communicate ideas to others, and fork from or revert to an earlier point in the creative process. Our approach uses a bottom-up agglomerative clustering mechanism that groups adjacent frames based on their perceptual similarity while maintaining the causality of how a sketch was constructed. The resulting aggregation dendrogram can be cut at any level depending on available display space, and can be used to create a visual history consisting of either a comic strip of highlights, or a single annotated summary frame. We conducted a user study comparing the speed and accuracy of participants recovering causality in a sketch history using comic strips, summary frames, and simple animations. Although animations with interaction may seem better than static graphics, our results show that both comic strip and summary frame significantly outperform animation.

The work was supported by the U.S. National Science Foundation. Here is the publication in IJHCS:

Zhenpeng Zhao, William Benjamin, Niklas Elmqvist, K. Ramani (2015): Sketcholution: Interaction Histories for Sketching. In: International Journal of Human-Computer Studies, 82 pp. 11–20, 2015.