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Three-Dimensional Spermatozoa Surface Reconstruction

Over the course of the last two semesters I have been working with my advisor Professor Serge Belongie at Cornell Tech and Dr. Brian Levine at Weill Cornell Medical College on a cross-school project in medical imaging. The project was originally conceived by the aforementioned two, but at the time they did not have the man-power to pick up the project full time. After talking to Professor Belongie about my interests in computer vision, he posed the project to me and I enthusiastically committed to working on it for the next year. And thus we set out with the goal of reconstructing three dimensional models of spermatozoa (sperm cells) from magnified videos of the cells swimming. Most people are taught that sperm swim in a side to side motion, but in fact this is only the two dimensional projection of how they swim. In reality, they swim in a sort of modified corkscrew motion, but again when viewing this in two dimensions it appears to be side-to-side. The importance of this is that the head of the sperm (see Figure 1) is not stationary, it in fact rotates periodically while it swims. This is particularly important because it means that over