(2.19) (2.20) (2.21) Rotation detection 2.3 Radon Soft Hash Function x 104 3.6 3.4 3.2 3 2.8 2.6 2.4 2.2 0 20 40 Signature of a scaled image 60 80 100 angle 120 140 160 180 Figure 2.13: Signature of lena scaled 35 To implement the metric of distance between the signatures of two ...