Read and written files in BTK

Acquisition file

An acquisition file contains mostly marker trajectories and analog channel data.

File Format	Reader	Writer	Class	Comments
ANB	x	x	btk::ANBFileIO	Motion Analysis binary file format containing analog channel data
ANC	x	x	btk::ANCFileIO	Motion Analysis ASCII file format containing analog channel data
ANG1	x		btk::ANGFileIO	BTS Bioengineering (Elite) binary file format containing (joint) angles
ASC2	x		btk::AMTIForcePlatformFileIO	AMTI ASCII file format containing FxFyFzMxMyMz data. No need of the COP file.
C3D	x	x	btk::C3DFileIO	Most common used file format. More informations on http://www.c3d.org
CAL	x	x	btk::CALForcePlateFileIO	Motion Analysis ASCII file format for force platform calibration
CLB	x		btk::CLBFileIO	Contec Inc. binary file format containing analog channel data
EMF	x		btk::EMFFileIO	Ascension Technology Corporation ASCII file format containing 3D trajectories
EMG	x		btk::DelsysEMGFileIO	Delsys Inc. binary file format containing EMG data
EMG	x		btk::EMxFileIO	BTS Bioengineering (Elite) binary file format containing EMG data
GR*3	x		btk::GRxFileIO	BTS Bioengineering (Elite) binary file format containing force platform data. Supports only platforms of type I
MDF	x		btk::MDFFileIO	Charnwood Dynamics Ltd (Codamotion) binary file format containing 3D trajectories, analog data and force platform geometry
MOM4	x		btk::MOMFileIO	BTS Bioengineering (Elite) binary file format containing joints' moments
PWR	x		btk::PWRFileIO	BTS Bioengineering (Elite) binary file format containing joints' powers
RAH	x		btk::RAxFileIO	BTS Bioengineering (Elite) binary file format containing joints' powers
RAW	x		btk::RAxFileIO	BTS Bioengineering (Elite) binary file format containing 3D trajectories
RIC	x		btk::RICFileIO	BTS Bioengineering (Elite) binary file format containing 3D trajectories
RIF	x		btk::RICFileIO	BTS Bioengineering (Elite) binary file format containing 3D trajectories
TDF	x		btk::TDFFileIO	BTS Bioengineering binary file format containing 3D trajectories, analog data and force platform geometry
TRB	x		btk::TRBFileIO	Motion Analysis binary file format containing 3D trajectories (Experimental: Need more files/informations to implement the writer.)
TRC	x	x	btk::TRCFileIO	Motion Analysis ASCII file format containing 3D trajectories
XLS	x		btk::XLSOrthoTrakFileIO	Motion Analysis ASCII file format exported from the software OrthoTrak
XMOVE	x		btk::XMOVEFileIO	Charnwood Dynamics Ltd (Codamotion) XML file format containing 3D trajectories, analog data and force platform geometry

Remarks

1. ANG files are loaded as 3D joints' angles instead of joints' angles separated in each plane (sagittal, frontal, transverse). Moreover, the foot progression angle is separated of the ankle angles for each foot.
2. AMTI ASC files require additional informations on the geometry of the force platform. More information in the description of the class btk::AMTIForcePlatformFileIO .
3. GR* files are loaded as force platforms of type I (i.e. ground reaction forces, COP, and ground reaction moments: F(X|Y|Z), P(X|Y), MZ).
4. MOM files contain moments expressed in Nm and stored by plane but values are automatically converted in Nmm and expressed by joints to be coherent with data in BTK.