CMO Library

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The CMO Library can be used to handle large data sets. This can be used to create a normal database for comparisons, or to process data across multiple subjects.


Introduction

The CMO Library opens the CMX file. The CMX file does not contain the model specific information, which means that the static subject C3D and model template is not loaded into the workspace along with the KINETIC_KINEMATIC folder.

The processed information is stored in the CMX file:

TARGET
ANALOG
FORCE
COFP
FREEMOMENT

LANDMARK
LINK_MODEL_BASED
METRIC
FRAME_NUMERS

The important thing to realize is that since the model based information is not stored in the CMX file, the user will need to calculate all LINK_MODEL_BASED signals (kinematics and kinetics) prior to loading the CMO Library. After these signals have been created, the user can load the CMO Library and do further processing on kinematics and kinetics.

Using the CMO Library

Load the CMO Library

To load the CMO Library:

1. Set the CMO Library Path by going to CMO Library -> Set CMO Library Path

NOTE: The CMO Library will load any CMO files in sub-folders

SetCMOLibraryPath.png


2. Catalog the CMO files by going to CMO Library -> Maintenance -> Catalog CMO Files

NOTE: By cataloging the CMO files, Visual3D updates each CMX file to ensure it reflects the processed data in the CMO file. The CMX file is also updated each time a CMO file is saved. If the CMX files have not been moved or deleted, this process does not need to be done more than once. (Especially since this process can takes a long time)

Maintenance CatalogCMOFiles.png

3. Browse the CMO Library by going to CMO Library -> Browse CMO Library

4. Click OK in the prompt

BrowseCMOLibrary.png


LoadedCMOLibrary.png

The CMO Library will be loaded into the workspace. The files will be highlighted in a purple color (in a regular CMO file, the files are highlighted in blue, grey, & pink).

1. The CMO files loaded into the workspace will be listed on the left under CMO Workspace
2. No files will be loaded under Models/Calibration files since model based data is not loaded in the CMO Library (see Introduction for more information)
3. The motion files associated with each CMO file will be listed under Motion Files
4. The TAGs in each CMO file will be loaded as well

Active File

The Active File selection in the CMO Library is one of the most important features.

Although any command can be run on the CMO Library, for the following example, the affect of running the METRIC_MEAN command on each of the active files will be explained.

For example:

While creating the CMO_Files, the maximum knee flexion during swing was calculated using the Metric_Maximum command. In each file there are at least two instances of maximum knee flexion.

After loading the CMO Library with multiple subject's CMO files, the average knee flexion is being calculated. The affect of selecting different Active Files is explained:

CMOLibrary SelectActiveFile.png

1. Individual C3D file -

If METRIC_MEAN is run on a specific C3D file, the result value will be the average knee flexion for that trial. If Generate Global Mean and STDDev is checked, the average value for the specified trial will be created in the GLOBAL workspace.

2. EACH_CMO_WORKSPACE -

If METRIC_MEAN is run on EACH_CMO_WORKSPACE, the average of each individual trial will be calculated. If Generate Global Mean and STDDev is checked, the average value for each CMO file for each of the trials will be averaged and stored in the GLOBAL workspace.

3. TAGs -

If METRIC_MEAN is calculated on a group of file tags, the average of each individual trial will be calculated. If Generate Global Mean and STDDev is checked, the average value for each of the tagged trials will be averaged and stored in the GLOBAL workspace.

4. GLOBAL -

The average values calculated while using the CMO Library will be stored here. These metrics should represent the average across multiple CMO files.

5. ALL_CMO_GLOBALS -

Any global metrics calculated when creating the CMO file will be stored here. When in the library, calculating metrics when EACH_CMO_WORKSPACE is active will also result in average values being calculated here. These metrics should represent the average across multiple trials within a CMO file.

Further Information

  1. A normal database can be created and plotted in other files using the CMO Library
    1. Instructions to create and export the CMO Library can be found here
  2. The CMO Library can be opened using the Load_CMO_Library command
  3. The CMO Library can be closed using the Unload_CMO_Library command
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