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51 lines
2 KiB
TeX
51 lines
2 KiB
TeX
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\subsection{Write Math}
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\begin{frame}{write-math.com}
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\begin{itemize}
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\item a website where users can add labeled training data
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\item works with desktop computers and touch devices
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\item symbol recognition can be done by multiple classifiers
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\item users can contribute formulas
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\item users can vote for formulas
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\item user who wrote the formula can accept one formula
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\end{itemize}
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\end{frame}
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\framedgraphic{Classify}{../images/classify.png}
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\framedgraphic{Workflow}{../images/workflow.png}
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\framedgraphic{User page}{../images/user-page.png}
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\framedgraphic{Information about handwritten-data}{../images/view.png}
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\framedgraphic{Non-mathematical symbols}{../images/yinyang.png}
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\framedgraphic{Training}{../images/train.png}
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\framedgraphic{Ranking}{../images/ranking.png}
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\framedgraphic{Symbol page}{../images/symbol.png}
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\begin{frame}{Statistics}
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\begin{itemize}
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\item 40 users
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\item 1076 symbols
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\item 5519 handwritten symbols (e.g. 195 times the letter \enquote{A})
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\begin{itemize}
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\item only 264 have 4 lines
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\item only 36 have 5 lines
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\item only 16 have 6 lines
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\item only 19 have 7 lines or more
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\item none has more than 12 lines
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\end{itemize}
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\end{itemize}
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\end{frame}
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\begin{frame}{First classification worker}
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\begin{itemize}
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\item preprocessing: Scale to fit into unit square while keeping the aspect
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ratio
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\item applies dynamic time warping
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\item compares a new handwritten symbol with every handwritten symbol
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in the database
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\item[$\Rightarrow$] Classification time is in $\mathcal{O}(\text{handwritten symbols})$,
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but we rather would like $\mathcal{O}(\text{symbols})$
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\item the current server / workflow can only handle about 4000 handwritten
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symbols
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\item[$\Rightarrow$] Another way to classify is necessary
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\end{itemize}
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\end{frame}
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