Automatic Discoid Lateral Meniscus Diagnosis from Radiographs Based on Image Processing Tools and Machine Learning

Figure 4

(a) Original image. (b) Image after applying the BM3D filter. (c) Image after applying a median filter. (d) Image after histogram equalization. (e) Satisfactory result of edge detection. (f) Result of finding the femoral condyle boundary and up-left and up-right feature points. (g) Result of finding the tibial spine. (h) The baseline of the tibial plateau (θ > 70°). In this case, shifting is visible on the right border point, as it differs from the right tangent point. (i) Putting everything together. The LJSD and HLTS are drawn on the image. In this case, LJSD/HLTS = 1.325.