The eNTERFACE08_3Dwalks Database


The eNTERFACE08_3Dwalks database is a 3D motion capture database from subjects performing several walk sequences. It can be used for animating avatars and for the analysis, modeling and synthesis of humanlike walking motion. It was recorded during the eNTERFACE'08 workshop (in the framework of the eNTERFACE 1-month summer workshops). The database is described in the eNTERFACE'08 final report of project 11: "A Database for Stylistic Human Gait Modeling and Synthesis". The three-dimensional motion data was captured using the IGS-190 motion capture suit from Animazoo, an integrated wireless motion tracking system equipped with inertial sensors. Fourty participants were recorded, walking at several self selected speeds and performing different direction changes. The data is recorded under the bvh file format.

This eNTERFACE08_3Dwalks Database is made available under the Open Database License. Any rights in individual contents of the database are licensed under the Database Contents License. Copyright 2008 University of Mons Authors: Joëlle Tilmanne.

More information can be obtained from the eNTERFACE'08 3D walks project report.
The database can be downloaded from this link.



CONTENTS


This database contains 17 walk sequences for 40 subjects. Those 17 sequences correspond, for each subject, to rectilign walks at different speeds, and to segments with direction changes of various amplitudes in the trajectory. The subjects were participants of other projects of the workshop who agreed to volunteer for the motion capture recording. The motion capture area was a 6m by 4m space, in which subjects were asked to walk given some instructions. The first step was to take the calibration pictures and to calibrate a skeleton for each participant. Once this was done, each subject came for approximately one hour of recording. They were first asked to remove their shoes and put on the motion capture suit. The walk in the database is thus always barefoot, on a perfectly even floor. 


The 17 sequences correspond to:


Part one = direction changes:

- direction0 : straight walk

- direction45: straight walk followed by a 45 degrees turn

- direction90: straight walk followed by a 90 degrees turn

- direction135: straight walk followed by a 135 degrees turn

- direction180: straight walk followed by a 180 degrees turn (equivalent to turning back)


Part two = speed changes: for each instruction, the sequence was performed three times (1,2,3)

- straight_normal : self-selected speed

- straight_slow: the performer was asked to imagine he was walking in a park, calmly

- straight_mid: the performer was asked to imagine that he was going to work, but he was not in a hurry

- straight_fast: the performer was asked to imagine ha had to catch a train and that he was really late, but that he was not allowed to run


The three-dimensional motion data was captured using the IGS-190 motion capture suit from Animazoo, an integrated wireless motion tracking system equipped with inertial sensors.



TECHNICAL ASPECTS

The IGS 190 motion capture suit contains 19 inertial sensors (InertiaCube3 from Intersense) consisting each of a 3 axis accelerometer, a 3 axis gyroscope and a 3 axis magnetometer. The data from those three sources are integrated and combined directly in the inertial sensor box, and angle data is thus provided straight from the sensor. Those angles which give the configuration of the inertial sensor are then postprocessed realtime trough the software provided with the suit. The output of the system is the set of angles between the body segments, at a rate of 30, 60 or 120 frames per second. In this database recording, the frame rate is chosen to be 60 fps (frames per second). 


There is no 3D position tracking system in the IGS suit, and the position of the actor is calculated by the software given a known initial position, using the length of the skeleton segments from the feet to the hip, the angles recorded between those segments for each frame, and always considering that the lower point of the skeleton is in contact with the ground. Because of that, drifts can appear.



LICENSE

This eNTERFACE'08 3D walk Database is made available under the Open Database License. Any rights in individual contents of the database are licensed under the Database Contents License. Copyright 2008 University of Mons Authors: Joëlle Tilmanne.