Fig. 3.

Synthetic fluoroscopic image creation process to simulate an in vivo stair rise motion. (a) Sample experimental fluoroscopic image. (b) Femur, tibia/fibula, and patella bone models manually matched to the experimental image. (c) orresponding synthetic fluoroscopic image generated by ray tracing the cortical bone models in their manually matched poses. (d) Femur, tibia/fibula, and patella bone models automatically matched to the synthetic image to evaluate the accuracy of the recovered pose parameters.