Image to Halftone to Printable Object
by gwygonik, published
This is a Processing app that will load a JPEG or PNG, convert it to a halftone image (with many parameters), and output a STL or OpenSCAD file.
Make cool halftone coasters. Use them as plastic "rubber" stamps. Make art!
This app was a result of a question posed on the Makerbot Operators Google group, and was written in 10-12 hours over the course of a few days. Feel free to take it and add features or make a standalone app or whatever.
You can download the source as well as packaged executables for Windows, OSX, and Linux.
DISCLAIMER: This app is presented as-is and does not come with ANY support. (No time for that here, sorry)
NOTE 1 - the resulting STL files MUST be run through a post-processing app like Netfabb to create printable models.
NOTE 2 - the resulting OpenSCAD files can take a REALLY LONG TIME to render in OpenSCAD before you can save a STL from there.
NOTE 3 - I've only tested the OSX executable (which works fine), but not the Windows or Linux ones. I've mostly run from source.
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This Processing app is packaged as an Eclipse workspace folder, as that was what was used to develop it, as well as pre-packaged executable files for Windows, OSX, and Linux. Please note, this source package will not work in the Processing IDE -- you must use Eclipse!
Tracked source is available on github, or download the un-tracked packaged source with this "thing".
To run from source, you also need to download and install:
Marius Watz's ModelBuilder library for Processing ( https://github.com/mariuswatz/modelbuilder - I used v0007a03) ControlP5 library ( http://code.google.com/p/controlp5/downloads/list - SPECIFICALLY v0.5.4)
I also used the handy Proclipsing tool ( http://code.google.com/p/proclipsing/ )
Add the project to your Eclipse workspace, and run HalftoneImageToSTL.
Alternatively, download one of the pre-compiled executables and launch HalftoneImageToSTL.
Once you get it running, load an image and adjust:
- number of grid divisions
- invert colors
- reduce colors (pixelate) with variable amount
- use fixed-height or variable-height halftone "dots" (each adjustable)
- save as STL or OpenSCAD script
Note that the output file is sized to max-out a Thing-o-Matic HBP.
- Fix from jcosmo that gets the app running on Windows
- Disabled UI navigation while trying to load image