# Quadratic Curve Fitting-Based Image Edge Line Segment Detection: A Novel Methodology
## 3 Edge Line Segment Extraction Based on Quadratic Curve Fitting
\begin{table}
\begin{tabular}{l l l l l l l l l l} \hline \hline
**Algorithm** & & & & & & & & & & **(a)–(x) Average** \\  & & & & & & & & & & **Processing** \\  & Regular lens & a & b & c & d & e & f & g & h \\  & images & 0.89 & 1.56 & 2.93 & 6.22 & 4.40 & 5.11 & 19.18 & 5.39 \\ \cline{2-10} LSD & Wide-angle & i & j & k & l & m & n & o & p \\ method & lens image & 1.03 & 1.90 & 2.30 & 135.19 & 2.76 & 1.25 & 1.22 & 4.91 \\ \cline{2-10}  & Fisheye lens & q & r & s & t & u & v & w & x \\ image & 1.25 & 26.14 & 64.19 & 157.43 & 2.07 & 0.78 & 2.86 & 2.78 \\ \hline  & Regular lens & a & b & c & d & e & f & g & h \\  & images & 0.39 & 0.49 & 0.70 & 0.81 & 0.72 & 0.69 & 0.94 & 0.82 \\ \cline{2-10} QF-LSD & Wide-angle & i & j & k & l & m & n & o & p \\  & lens image & 0.36 & 0.41 & 0.65 & 1.28 & 0.57 & 0.32 & 0.55 & 0.68 \\ \cline{2-10}  & Fisheye lens & q & r & s & t & u & v & w & x \\ image & 0.39 & 0.94 & 1.17 & 1.82 & 0.56 & 0.30 & 0.67 & 0.61 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Running time comparison (unit: seconds). ## References

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