The SEG parameter group was originally a part of the AMASS software system and was included in the C3D file to provide the user with information as to what parameters were used when the data were tracked and processed. It is used by a number of different 3D photogrammetry applications contains application specific values. While many of these applications use the same common set of parameter names it should not be assumed that parameters are interpreted in the same way, or contain the same values.
The presence of SEG parameters in a C3D file is optional and normally only serves to provide information that is specific to the application that initially created the C3D file.
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