Voronoi stippling
https://www.cs.ubc.ca/labs/imager/tr/2002/secord2002b/secord.2002b.pdf
http://mrl.nyu.edu/~ajsecord/npar2002/npar2002_ajsecord_preprint.pdf
https://www.mattkeeter.com/projects/swingline/
https://github.com/mkeeter/Swingline
https://github.com/nagytam/VoronoiDiagram
https://github.com/joesfer/Stippling
https://github.com/MaxHalford/pointu
https://maxhalford.github.io/blog/halftoning-2/
https://github.com/thegrandpoobah/voronoi
https://rosettacode.org/wiki/Voronoi_diagram#Python
https://github.com/joesfer/Stippling/blob/master/source/Voronoi.cs

TSP
http://jackxmorris.com/posts/traveling-salesman-art
https://github.com/jxmorris12/traveling-salesman-art
https://github.com/jvkersch/pytsp
https://neos-server.org/neos/solvers/co:concorde/TSP.html - form submits job to run at arizona state university. You receive an email when job completes
https://neos-server.org/neos/solvers/co:concorde/TSP-help.html
https://github.com/Behzadkhosravifar/TSP
http://www.cgl.uwaterloo.ca/csk/projects/tsp/
https://github.com/pdrozdowski/TSPLib.Net
https://www.nuget.org/packages/TSPLib.Net/

Image processing library for .net core
https://github.com/JaCraig/Structure.Sketching
https://github.com/SixLabors/ImageSharp
http://imageprocessor.org/

GCode
http://www.warrensbrain.com/gcode-to-english-translator.html
https://gorest.co.in/tools/gcode-translator.html
http://thomasrickard.uk/articles/part-6:-design-app,-holes-06-06-2016.html
http://thomasrickard.uk/articles/part-7:-design-app,-profiles-10-06-2016.html
http://thomasrickard.uk/collections/makeit.html
https://github.com/gradientspace/gsGCode
https://www.marginallyclever.com/product/makelangelo-software/
https://github.com/MarginallyClever/Makelangelo-software

String art
https://hackaday.io/project/13047-automate-the-art
https://taylorholmes.com/2016/08/05/conversational-interview-string-artist-petros-vrellis/
https://www.youtube.com/watch?v=orPiPpaeN3E
https://github.com/christiansiegel/knitter
https://github.com/i-make-robots/weaving_algorithm
https://github.com/MaloDrougard/knit
https://hackaday.com/2016/07/28/computer-designed-portraits-knit-by-hand/
http://www.thevelop.nl/blog/2016-12-25/ThreadTone/
https://github.com/nathanbain314/lineDrawer/tree/master/lib
https://github.com/wose/Strixel
https://www.youtube.com/watch?v=9uuwPgqOPBM
https://github.com/theveloped/ThreadTone
https://g6mandicsc490.wordpress.com/
https://github.com/danielvarga/string-art
https://github.com/JulienSiems/Voronoi-Image-Filter
https://github.com/jose-villegas/Edge-Detection

Todo
Conditional validation - coin stippler page - https://github.com/JeremySkinner/FluentValidation
Rename page to coinstippler page
finish tspsol page
gcode page should scale according to size of smallest coin
Webcam to view cnc router
upload and download files
display image before and after modification