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Optical Flow on Evolving Sphere-Like Surfaces

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If you have a question about this talk, please contact Carola-Bibiane Schoenlieb.

This is a joint CIA-CCIMI seminar

In this talk we will consider optical flow on evolving surfaces which can be parametrised from the 2-sphere. Our main motivation is to estimate cell motion in time-lapse volumetric (4D) microscopy images depictinguorescently labelled cells of a live zebrafish embryo. We exploit the fact that the recorded cells float on the surface of the embryo and allow for the extraction of a two-dimensional image sequence together with a surface parametrisation. The variational optical flow problem is then solved with a Galerkin method based on tangent vector spherical harmonics. Finally, we present numerical results and discuss recent efforts. This is joint work with Otmar Scherzer.

This talk is part of the Cambridge Image Analysis Seminars series.

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