Licentiate thesis 2005-011

Towards Markerless Analysis of Human Motion

Björn Holmberg

16 December 2005


The topic for this thesis is the analysis of human movement, or more specifically, markerless analysis of human movement from video material. By markerless analysis is meant that the full image material is used as input in contrast with the traditional marker systems that only use the position of marker centers. The basic idea is to use more of the information in the images to improve the analysis.

Starting off with the aim of markerless analysis an application is designed that use to the subject added texture to estimate the position of the knee joint center in real images. The approach show the plausibility of using subject texture for estimation purposes.

Another issue that is addressed is how one can generate synthetic image data. Using basic tools of graphics programming a virtual environment used to synthesize data is created. This environment is also used to evaluate some different camera solutions.

One method to make three dimensional reconstruction from multiple images of an object is tested using the synthetic data. The method is based on a "brute force" approach and does not show good performance in terms of computing speed. With appropriate representations of the three dimensional objects, mathematica methods might speed up the analysis.

Available as PDF (1.74 MB)

Download BibTeX entry.