Fig. 2.

Illustrations of the landmark points placed by the annotators who established the ground truth on a dedicated web-based platform. There were five unique landmarks for each leg. A The orange point corresponds to the top of the femoral head and the purple point to the center of the femoral head. B The light blue point corresponds to the femoral intercondylar notch and the green point to the center of the tibial spine. C The red point corresponds to the center of the distal tibia