These algorithms cannot be applid d

These algorithms cannot be applid directly to raster images of stop motion animation because the transformation information about the scene is absent. Both convolution with a path and super sampling that path in time require that the motion be fully specified while the shutter” is open. Raster images of stop motion are effectively snapshots, which in terms of motion, were shot with an infinitely fast shutter. While only the animator knows the true paths of the objects, visual inspection of the scene allows us to infer approximations of the intended motion paths. Cucka managed to estimate localized motions when developing a system to add motion blur to hand-drawn animations. Much like the commercial blur-generation and video retiming packages currently available, only small frame-to frame motions are tracked successfully, and pre-segmentation must be done either by hand or as part of the animation process.