Figure7.14 shows three examples of the results obtained using Code 7.2. In each
example, we show the curve, the angular function, the cumulative normalised angular
Figure 7.14Example of angular Fourier descriptors
(b) Angular function
(c) Normalised
(d) Fourier descriptors
200
150
100
50
0
0100200
200
150
100
50
0
0100200
(i) Curve
(e) Curve
(f) Angular function
6
4
2
0
0200400600
6
4
2
0
0200400600800
200
150
100
50
0
0100200
(j) Angular function
6
4
2
0
0200400600800
(g) Normalised
5
0
Ð5
0246
5
0
Ð5
0246
(k) Normalised
5
0
Ð5
0246
(h) Fourier descriptors
(a) Curve
1
0.5
0
Ð0.5
Ð1
05101520
1
0.5
0
Ð0.5
Ð1
05101520
1
0.5
0
Ð0.5
Ð1
05101520 ...
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