Using Visual Doppler Effects to Deduce Image Velocities

This paper presents preliminary work on the development of a new method of calculating image motion elds based on visual doppler eeects. It is inspired from the use of doppler eeects in Radar. Unlike Radar, one cannot`send out' special signals of known frequencies into an image to measure velocities. It is the image itself that provides the (highly variable) frequency signals. However, what one can do isìook across' an image in various directions at known velocities, i.e. we can impose a known velocity onto an image and observe the changes in frequency information. From this one can deduce the velocities present in an image.