Brain Journal-Annsvm: A Novel Method For Graph-Type Classification By Utilization Of Fourier Transformation, Wavelet Transformation, And Hough Transformation-Figure 8. Simulation Of Coiflet 1 (Pywavelets Discussion Group, 2008), Analyzing As One-Dimensional Images& Masaomi Kimura
Using only the wavelet coefficients was inadequate for classification. For example, for the pie chart, we obtained large wavelet coefficients located in the low-frequency domain; however, if we changed a circle in the pie chart to other shapes, such as a radar chart, the wavelet transformation gave results that were similar to those of the original pie chart. The Hough transformation can solve this problem since it detects the shapes of objects
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