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Elliptic fourier for shape analysis 1.0

Date Added: May 28, 2013  |  Visits: 159

1) plot_chain_code(ai, color, line_width)This function will plot the given chain code. The chain code (ai) should be incolumn vector.Example:>> ai = [5 4 1 2 3 4 3 0 0 1 0 1 0 0 0 7 7 1 1 0 7 5 4 5 4 5 0 6 5 4 1 3 4 4 4 4 6];>> plot_chain_code(ai)2) plot_fourier_approx(ai, n, m, normalized, color, line_width)This function will plot the Fourier approximation, given a chain code (ai),number of harmonic elements (n), and number of points for reconstruction (m).Normalization can be applied by setting "normalized = 1".3) output = calc_traversal_dist(ai, n, m, normalized)This function will generate position coordinates of chain code (ai). Number ofharmonic elements (n), and number of points for reconstruction (m) must bespecified.The output is a matrix of [x1, y1; x2, y2; ...; xm, ym].3) output = fourier_approx(ai, n, m, normalized)This function will generate position coordinates of Fourier approximation ofchain code (ai). Number of harmonic elements (n), and number of points forreconstruction (m) must be specified.The output is a matrix of [x1, y1; x2, y2; ...; xm, ym].4) output = calc_harmonic_coefficients(ai, n)This function will calculate the n-th set of four harmonic coefficients.The output is [an bn cn dn]5) [A0, C0] = calc_dc_components(ai)This function will calculate the bias coefficients A0 and C0.6) output = calc_traversal_dist(ai)Traversal distance is defined as accumulated distance travelled by everycomponent of the chain code assuming [0 0] is the starting position.Example:>> x = calc_traversal_dist([1 2 3])x = 1 1 1 2 0 37) output = calc_traversal_time(ai)Traversal time is defined as accumulated time consumed by everycomponent of the chain code.Example:>> x = calc_traversal_time([1 2 3])x = 1.4142 2.4142 3.8284

 Requirements: No special requirements Platforms: Matlab Keyword: Calc Componentsai,  Calc Harmonic Coefficientsai,  Calculate,  Coefficients,  Coordinates,  Defined,  Distance,  Number,  Traversal Users rating: 0/10