An Automatic Knee Osteoarthritis Diagnosis Method Based on Deep Learning: Data from the Osteoarthritis Initiative

Figure 7

Locations of knee detections. Vertically, all detections appear in the middle region of the image except for outliers. Horizontally, two pairs of clusters are labeled as “X” and “Y” according to the positions. The clusters are caused by different X-ray image sizes and knee alignment. Cluster “X” has only one pair of centroids. While cluster “Y” is split into 3 subgroups. Each subgroup on the right has its counterpart on the left.