Fig. 2
From: HVAngleEst: A Dataset for End-to-end Automated Hallux Valgus Angle Measurement from X-Ray Images
The workflow for HVA, IMA, and line segments labeling: (1) Two parallel lines (red dashed lines) were drawn to annotate the great toe, the first metatarsal, and the second metatarsal. (2) The midpoints of these parallel lines were joined to create a straight line. (3) The points where this straight line intersects the edge of the phalanx defined the line segment points for that phalanx. The points (a, b), (c, d), and (e, f) correspond to the line segments of the great toe, the first metatarsal, and the second metatarsal. (4) HVA and IMA were calculated by the endpoints of each phalanx.
