ABiLiTieS Fourier Descriptors Analysis Team Fourier descriptors Ahmad Alkhodre & Mostefa Belarbi...
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Transcript of ABiLiTieS Fourier Descriptors Analysis Team Fourier descriptors Ahmad Alkhodre & Mostefa Belarbi...
ABiLiTieS Fourier Descriptors Analysis Team
Fourier descriptorsFourier descriptors
Ahmad Alkhodre & Mostefa BelarbiInsa Lyon
Georg Langs & Srdan Tosovic
Vienna University
Nicolas Sicard Pavia University
ABiLiTieS Fourier Descriptors Analysis Team
Contents IntroductionFourier descriptorsClassification Occlusion problem
First approaches Final reslts
Conclusion
ABiLiTieS Fourier Descriptors Analysis Team
Introduction
Using shapes Advantages Drawbacks
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Image classificationDifferent means
ABiLiTieS Fourier Descriptors Analysis Team
Fourier descriptors
original picture borderdecomposed toreal + imaginary part
Fourier coefficients Fourier descriptors
ABiLiTieS Fourier Descriptors Analysis Team
Elliptic Fourier descriptors
Defining a curve in the complex plane
c(t)=x(t)+j y(t)t = arc length
ABiLiTieS Fourier Descriptors Analysis Team
Invariance (Rotation)
2y1
2x1
2yk
2xk
2y1
2x1
2yk
2xk
kbb
bb
aa
aaD