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This program wraps height map images around cylinders. That means you can take any image and make a cylindrical spiral vase that veries it's diameter as a function of the image brightness.
The program creates an OpenSCAD program which you can run in the download from www.openscad.org. Then you can make an STL file and generate gcode via Slicer on the spiral vase setting. That's a bit of a tool chain, just realize that it gives you lots of power to create what you want.
Sometimes this makes a great shape and sometimes it makes a poor shape - it all depends on the image. Not every image is a height map, and most are not. You should experiment with different images until you get a feel for how the program works.
This program is written in the Processing language, so to use it you must go to www.processing.org and download the free program. Please make a donation if you can.
You must slightly modify the program each time you run it in order to put the filename in the beginning. I want to improve the code so it has a popup window to find the file but I have not gotten around to it yet. I will do so soon. Also feel free to modify the code in other ways to get varied effects.
Also please note that this YouMagine entry is in WIKI mode so you can modify it with your improvements to the code! Long live OpenSource! :)