@conference { 27,
	title = {Factored Time-Lapse Video},
	booktitle = {ACM Trans. on Graphics (ACM SIGGRAPH 2007)},
	volume = {26},
	year = {2007},
	month = {07/2007},
	pages = {101-111},
	publisher = {ACM},
	organization = {ACM},
	edition = {No. 3},
	abstract = {We describe a method for converting time-lapse photography captured with outdoor cameras into Factored Time-Lapse Video (FTLV): a video in which time appears to move faster (i.e., lapsing) and where data at each pixel has been factored into shadow, illumination, and reflectance components. The factorization allows a user to easily relight the scene, recover a portion of the scene geometry (normals), and to perform advanced image editing operations. Our method is easy to implement, robust, and provides a compact representation with good reconstruction characteristics. We show results using several publicly available time-lapse sequences.},
	author = {K. Sunkavalli and Matusik, W. and H. Pfister and S. Rusinkiewicz}
}