NIH Clinical CenterNational Institutes of Health
CCHomeCCPublic/PatientsCCProfessionals/ScientistsCCStaffContact the Clinical CenterCC Site MapCC Search
The Physical Disabilities Branch logo banner.  Logos for the Clinical Center and National Institute for Child Health and Human Development are also shown.The NIH Clinical CenterNational Institute of Child Health and Human Development
PDB HomeAbout the PDBDirections to the PDBContact the PDBPDB PersonnelTraining OpportunitiesEmployment OpportunitiesPDB Departmental Pages
Events and PresentationsResearchResourcesPublicationsLinks


Motion Capture System Testing


The following tests are provided as a guide and "self-check" for evaluating the setup and general performance of a motion capture system.

(Spaces to enter the results of your self-tests have been provided for your use.)


Camera Detector Sensitivity Test
Functional Depth of Field Test
Functional Field of View Test
Illumination Interference Test
Distorted Target Image Test
Phantom Target Test
Camera Pairs Effect Test
3D Target Trajectory Creation Test
3D Target Trajectory Continuation
Optimal Target Configuration Test


Camera Detector Sensitivity Test

Test description:
View the camera image to determine if background information is detected. Clothing and skin should be moved closer and closer to the camera lens.


Results:





Functional Depth of Field Test

Test description:
Starting at a location beyond the target detection range, systematically move a target closer to the camera lens. Record the distance when the target is first imaged (far limit) by the camera and distance at which the target is no longer properly identified (near limit). Test these limits while the target is moving and with different size targets.


Results:





Functional Field of View Test top

Test description:
Determine the field of view (left to right) in which the target is detected. If possible, perform this test at the near and far limits of the functional depth of field. Relate these findings to the lens viewing angle.


Results:





Illumination Interference Test

Test description:
Position two cameras such that they face each other and determine the size of the strobe illuminations and whether the strobe illuminations are identified as one or more targets.


Results:





Distorted Target Image Test

Test description:
Slowly merge images from two targets in front of one camera. Observe and, if possible, sample the target centroid locations.


Results:





Phantom Target Test top

Test description:
Attempt to create phantom targets by placing two targets in the camera plane of two cameras. Create an optimal camera plane by adding a third camera. Observe the effects a third camera makes on the phantom targets.


Results:





Camera Pairs Effect Test

Test description:
Place a single target in the middle of a data reduction volume. While sampling the target's location, walk around the target to systematically block the camera views. Measure the observed motion in the static target's location.


Results:





3D Target Trajectory Creation Test

Test description:
Start with 2 targets placed closely together. Add one target at a time to form a line of targets that are equally spaced. Continue this process until you have at least 6 targets in a straight line. Observe how the target tracking software works on each successive number of targets.


Results:





3D Target Trajectory Continuation

Test description:
While measuring its location, drop a target on the floor and let it bounce.


Results:





Optimal Target Configuration Test top

Test description:
Place 3 targets on the foot and walk through the data capture volume while sampling the target locations. Insure that the target images do not merge. Do the targets track properly?


Results:




Intro




  
  


PDBHome | About Us | Directions | ContactPDB

Personnel | Training | Employment | Dept | Events | Research | Resources | Publications | Links

CCHome | Public/Patients | Professionals/Scientists | Staff | Contact Us | Site Map | CC Search

For more information about the Clinical Center,
e-mail occc@cc.nih.gov, or call Clinical Center Communications, 301-496-2563.

Warren Grant Magnuson Clinical Center
National Institutes of Health
Bethesda, Maryland 20892-7511