Page 52 - Canine Lameness
P. 52
24 2 Objective Gait Analysis
Camera elevated and projected Camera at level of subject and
downward and not perpendicular perpendicular to the calibrated
to the calibrated plane plane
90°
70°
Altered length measurements True length measurements
Altered joint angles True joint angles
Calibrated plane
Figure 2.5 A possible source of error in 2D kinematics: camera position relative to the subject.
Out-of-plane In-plane Out-of-plane
(near to camera) (far from camera)
Increased length measurements True length measurements Reduced length measurements
(no effect on joint angles) True joint angles (no effect on joint angles)
Calibrated plane
Figure 2.6 A possible source of error in 2D kinematics: subject positioning relative to the calibrated plane
(near‐far).
