The Research And Implementation On Motion Edit Technology Based On Human Motion Capture Data

Using motion capture data to create a delicate,natrual lifelike character animationfor the virtual charactrs is a research topics in the area of computer animation,3Dgames,film special effects,virtual reality and other fields. With the development ofmotion capture technology,a large number of realistic human motion data can becaptured.Moton data files recorded the motion data of performers and his bodyinformation. How to make good use of this captured data is a major research focus inthe field of computer animation.Motion edit is one of the important methods for reusethe motion capture data.This article discussed three key technologies of motion edit.We focused on threeaspects of motion retarget,motion path edit and motion connect. The main research ofpath editing is how to modify the motion path for a given original motion data toenable them adapt the new path;The main research of motion retarget is retargetingmotion data from the performer model to the target model and preserve desirablequalities of the original motion.Motion connection is connecting small motion clips tolong sequence smoothly.The main work and innovation of this paper are:use the motion retarget algorithmbased on geometric scale and the correspondence of joint to retarget motion fromoriginal model to the target model which have different limb lengths andtopology.This paper provides a method to altering the origin captured data to follow adifferent path for motion edit,and derived the transformation formulat, then use thestep method to solve the sliding phenomenon in the path editing process.We use themotion retarget mothed based on geometric scaling to motion connect,so we canconnect the motion with different limb length.Quaternion distance is introduced infinding the transition points,achieved two different kinds of interpolation algorithm inthe quaternion space,find the best transition point,then set the threshold,and select theinterpolation structure automatically between two interpolation algorithm.For themotion which have different frequence,we consider the angular acceleration,somotion connection can have a smoothly transition between the different freequencies.Motion edit platform is implemented by using OpenGL.Achieved the basicfunctions of motion retargeting,motion path edit,motion connecting and make a goodpreparation for the further reasearch of motion edit.