On Mon, Apr 29, 2013 at 7:49 AM, Juan Nunez-Iglesias <jni.soma@gmail.com> wrote:

In Marianne's case, there is a 3D volumetric image in addition to a time axis.

Furthermore, if the time resolution in t is sufficient, many nD algorithms can be used, along t as well (with suitable parameters e.g. sigma for gaussian gradient magnitude). For an example, see:

Andres, B., Kroeger, T., Briggman, K. L., Denk, W., Korogod, N., Knott, G., Koethe, U., and Hamprecht, F. A. (2012). Globally optimal closed-surface segmentation for connectomics. ECCV, 778–791.

where they use a 3D segmentation method to do tracking in 2D+t video.

@Juan, this was an interesting read. I can feel why the 3D volumetric algorithm fits 2D x t (video), because the task involved is segmentation based tracking. However, I am still not fully convinced(would like to know more such examples if any) and feel that most nD algorithms would work differently on 2D x t and 3D. Thanks.