The current section aims to provide a comprehensive overview of the chosen file format, used either for the ground truth data or our method's results.

The employed file format is that of the .INI files. For the ground truth data we provide a separate .ini file for each frame, while for our method's results we provide a single file. In both cases, the structure of the information is the same, as shown in the image on the left.

The basic element contained in an INI file is the key or property. Every key has a name and a value, delimited by an equals sign (=). The name appears to the left of the equals sign and is of the form BodyPart_UserID_Dimension ("_" here are used as separators and are not actually used):

• BodyPart corresponds to on of the 13 body parts for which we provide information, namely the face, the left and right shoulders, the left and right elbows, the left and right palms, the left and right hips, the left and right knees and the left and right foot which are represented as F, LS, RS, LE, RE, LP, RP, LH, RH, LK, RK, LF, RF respectively.
• UserID is usually 0.
• Dimension represent the location value on each of the axes -horizontal X, vertical Y and depth Z- and are represented as X3, Y3 and Z3.

Keys may (but need not) be grouped into arbitrarily named sections. The section name appears on a line by itself, in square brackets ([ and ]) and represents the number of the corresponding frame (e.g. information for frame 146 lies under section [146]).

In case where all three dimensions of a specific body part assume the value of -1, it means that there is no information regarding that part in the examined frame.