Fourier descriptors Ahmad Alkhodre Mostefa Belarbi Insa Lyon

Fourier descriptors Ahmad Alkhodre & Mostefa Belarbi Insa Lyon Georg Langs & Srdan Tosovic Vienna University Nicolas Sicard Pavia University ABi. Li. Tie. S Fourier Descriptors Analysis Team

Contents ® Introduction ® Fourier descriptors ® Classification ® Occlusion problem ® First approaches ® Final reslts ® Conclusion ABi. Li. Tie. S Fourier Descriptors Analysis Team

Introduction ®Image classification ®Different ® means Using shapes ® ® Advantages Drawbacks ? ABi. Li. Tie. S Fourier Descriptors Analysis Team

Fourier descriptors original picture border Fourier coefficients decomposed to real + imaginary part Fourier descriptors ABi. Li. Tie. S Fourier Descriptors Analysis Team

Elliptic Fourier descriptors Defining a curve in the complex plane c(t)=x(t)+j y(t) t = arc length ABi. Li. Tie. S Fourier Descriptors Analysis Team

Fourier decomposition =. . . ABi. Li. Tie. S Fourier Descriptors Analysis Team

Fourier decomposition? ABi. Li. Tie. S Fourier Descriptors Analysis Team

Invariance (Rotation) ABi. Li. Tie. S Fourier Descriptors Analysis Team

Fourier decomposition (of Nicolas) Processing ABi. Li. Tie. S Fourier Descriptors Analysis Team

Invariance (congruent) work in progress ABi. Li. Tie. S Fourier Descriptors Analysis Team

Invariance (Rotation) work in progress ABi. Li. Tie. S Fourier Descriptors Analysis Team

Reconstruction ABi. Li. Tie. S Fourier Descriptors Analysis Team

Classification work in progress ABi. Li. Tie. S Fourier Descriptors Analysis Team

Occlusion problem work in progress ABi. Li. Tie. S Fourier Descriptors Analysis Team

Conclusion ABi. Li. Tie. S Fourier Descriptors Analysis Team