Raspberry Pi Projection Mapping Crash Course


Projection mapping might not be a term you’re familiar with, but you’ve certainly seen the effect before. It’s when images are projected onto an object, usually one that has an interesting or unusual shape, to create an augmented reality display. Software is used to map the image or video to the physical shape it’s being projected on, often to surreal effect. Imagine an office building suddenly being “painted” another color for the Holidays, and you’ll get the idea.

This might seem like one of those things that’s difficult to pull off at the hobbyist level, but as it turns out, there’s a number of options to do your own projection mapping with the lowly Raspberry Pi. [Cornelius], an avid VJ with a penchant for projection mapping, has done the legwork and put together a thorough list of different packages available for the Pi in case you want to try your hand at the futuristic art form. Many of them are even open source software, which of course we love around these parts.

[Cornelius] starts by saying he’s had Pis running projection installations for as long as three years, and while he doesn’t promise the reader it’s always the best solution, he says its worth getting started on at least. Why not? If the software’s free and you’ve already got a Raspberry Pi laying around (we know you do), you just need a projector to get into the game.

There’s a lot of detail given in the write-up, including handy pro and con lists for each option, so you should take a close look at the linked page if you’re thinking of trying your hand at it. But the short version is that [Cornelius] found the paid package, miniMAD, to be the easiest to get up and running. The open source options, ofxPiMapper and PocketVJ, have a steeper learning curve but certainly nothing beyond the readers of Hackaday.

To make things easier, [Cornelius] even goes on to give the reader a brief guide on setting up ofxPiMapper, which he says shouldn’t take more than 30 minutes or so using its mouse and keyboard interface. It would be interesting to see somebody combine this with the Raspberry Pi integrated projector we saw a couple years back to make a highly portable mapping setup.



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