An animation bilateral filter for slow-in and slow-out effects

In this paper, we introduce a method that endows a given animation signal with slow-in and slow-out effects by using a bilateral filter scheme. By modifying the equation of the bilateral filter, the method applies reparameterization to the original animation trajectory. This holds extreme poses in the original animation trajectory for a long time, in such a way that there is no distortion or loss of the original information in the animation path. Our method can successfully enhance the slow-in and slow-out effects for several different types of animation data: keyframe and hand-drawn trajectory animation, motion capture data, and physically-based animation by using a rigid body simulation system.

Research highlights► The bilateral filter can be exploited for cartoon-style slow-in and slow-out effect. ► Formulating a bilateral filter based on the curve parameter for animation retiming. ► This animation bilateral filter can be applied to various animation data.