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\subsection{Features}
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\begin{frame}{Features}
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\begin{columns}[T] % contents are top vertically aligned
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\begin{column}[T]{5cm} % each column can also be its own environment
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\textbf{Local Features}
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\begin{itemize}
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\item Coordinates
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\item Speed
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\item Binary pen pressure
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\item Direction
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\item Curvature
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\item Bitmap-environment
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\item Hat-Feature
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\end{itemize}
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\end{column}
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\begin{column}[T]{6cm} % alternative top-align that's better for graphics
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\textbf{Global Features}
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\begin{itemize}
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\item \# of dots ($i$, $j$, $\therefore$, $\because$, \dots)
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\item \# of strokes
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\item Center point coordinates
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\item Bitmap
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\item Bounding box (width, height, time)
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\item Re-curvature per stroke $s$ $\left ( \frac{\text{height}(s)}{d(s[0], s[-1])} \right )$
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\item Ink
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\end{itemize}
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\end{column}
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\end{columns}
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\end{frame}
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