pykinematics.omc.segmentFrames.pelvis

pykinematics.omc.segmentFrames.pelvis(marker_data, use_cluster=False, R_s_c=None, marker_names='default')

Create the pelvis anatomical frame.

Parameters:

marker_data : dictionary

Dictionary of marker position data. Keys correspond to marker names

use_cluster : bool, optional

Use the cluster to segment rotation to compute the anatomical frame. Default is False.

R_s_c : {None, numpy.ndarray}, optional

If use_cluster is False, R_s_c is ignored. If use_cluster is True, then a 3x3 rotation matrix must be provided that is the rotation from the segment to cluster frame for the pelvis.

marker_names : {‘default’, pymotion.omc.utility.MarkerNames}, optional

Either ‘default’, which will use the default marker names, or a modified MarkerNames object, with marker names as used in the keys of pelvis_data, left_thigh_data, and right_thigh_data.

Returns:

pelvis_af : numpy.ndarray

3x3 matrix representing the pelvis anatomical frame. Also is the rotation from world frame into the pelvis anatomical frame. Columns are the x, y, z axes of the anatomical frame.