Polyline Simplification - PaintLab/PixelFarm GitHub Wiki
see ...
1.burningmime ***
https://github.com/burningmime/curves
2.An Algorithm for Automatically Fitting Digitized Curves
from "Graphics Gems", Academic Press, 1990
https://github.com/erich666/GraphicsGems/blob/master/gems/FitCurves.c
3.A C# Implementation of Douglas-Peucker Line Approximation Algorithm
from http://www.codeproject.com/Articles/18936/A-Csharp-Implementation-of-Douglas-Peucker-Line-Ap
4.WPF based
http://www.codeproject.com/Articles/31859/Draw-a-Smooth-Curve-through-a-Set-of-D-Points-wit
5.Ramer–Douglas–Peucker algorithm
http://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm
from http://visualcomputing.yonsei.ac.kr/papers/1997/compare.pdf