Abstract. This paper proposes a new user interface paradigm for motion capture based animation systems, providing intuitive and efficient ways to visualize the main motion capture concepts and operations. A prototype system was built, implementing the prop

Figure6:Jointselection(detailfromskeletongraphwindow)andvisualfeedbackintherenderingwindow.

3.2Motions

Inthepost-productionvideointerfacemodel,videoandsoundsequencesarevisualizedashorizontalbars,whichcanbegrouped,positionedandcombinedinatimelinecanvas,inordertoproducethe nalcomposition.

Inourparadigm,wetreatamotionasahorizontalbar(Figure7),whosewidthisdeterminedbythenumberofframesofthecapturedmotion.Thisbaralsocontainsinformationaboutthemotionname.Notethearrowmarkerattherightendofthemotionbar,whichindicatesthatmotionresizing(reparametrization)is

allowed.

Figure7:MotionrepresentationasaGUIobject.

Wewillusuallyvisualizethemotionbarusingaframerulerassociatedwithit.Thisgivesamoreaccuratetemporalperceptionofthemotion.

TheMotionScratchPad