Image-Based Motion Blur for Stop Motion Animation
Author(s): Gabriel J. Brostow, Irfan Essa.
Proceedings: SIGGRAPH 2001, pp. 561--566,
2001.
[BibTeX] 
Abstract:
Stop motion animation is a well-established technique where still
pictures of static scenes are taken and then played at film speeds
to show motion. A major limitation of this method appears when
fast motions are desired; most motion appears to have sharp edges
and there is no visible motion blur. Appearance of motion blur is a
strong perceptual cue, which is automatically present in live-action
films, and synthetically generated in animated sequences. In this
paper, we present an approach for automatically simulating motion
blur. Ours is wholly a post-process, and uses image sequences,
both stop motion or raw video, as input. First we track the frameto-
frame motion of the objects within the image plane. We then integrate
the scene’s appearance as it changed over a period of time.
This period of time corresponds to shutter speed in live-action filming,
and gives us interactive control over the extent of the induced
blur. We demonstrate a simple implementation of our approach as
it applies to footage of different motions and to scenes of varying
complexity. Our photorealistic renderings of these input sequences
approximate the effect of capturing moving objects on film that is
exposed for finite periods of time.