621905.fig.006a
(a) Original edge
621905.fig.006b
(b) Corner detection (427 corners)
621905.fig.006c
(c) Filtering corners outside vertebra contours (196 corners)
621905.fig.006d
(d) Applying angle filter (59 corners)
Figure 6: Illustration of the effect of filtering out corners neighboring a contour (b) and the filtering of false corners (c).