Projection mapping, also known as video mapping or spatial augmented reality, allows you to make your surroundings come alive. It involves taking a video, animation, images, or any other visual material and project them onto a surface or objects to provide context or information or create an immersive experience. In the simplest form, projection mapping requires a computer, mapping software, a projector, and video content mapped onto a surface.
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And with the Touch Board and Electric Paint, you can make projection mapping immersive! You can extend the Touch Board's twelve capacitive sensors with the Electric Paint to create points of interaction on the projection surface. Touching your Electric Paint designs sends a signal to the software and triggers an animation or video. We've seen incredible projection mapping projects on walls, floors, and even 3D objects. Electric Paint and the Touch Board make it possible to transform any surface into a stunning, interactive projection-mapped project!
In this tutorial, we explain how to set up projection mapping with the Touch Board and make an interactive wall. We use the tools that come with the Interactive Wall Kit and use MadMapper as the mapping software, but you can use other mapping software that can take MIDI signals as inputs. You can download a trial version for MadMapper from the MadMapper website.
For projection mapping to be most effective, you need to choose a bright projector. If you have a short distance between where you place the projector and where you want your projection mapping to happen, you need a short-throw projector. One of the most popular choices is the Epson 1060 projector, which is bright enough to work in daylight.
Now open your projection mapping software, we are using MadMapper. Ensure that your computer isn't mirroring its display and that the projected display is larger than the sensor. Enter the Full Screen Mode of your projection mapping software.
Projection mapping is not limited to a wall as a canvas. You can also use objects. The Interactive Wall Kit isn't limited to walls either. The kit works great with 3D objects too. Remember that you don't always need to drill a connection for the Interactive Wall Kit, you have more options if you are using touchless sensors, which we explain in our proximity sensors tutorial.
If you want to add sounds, you only need to add the sounds to the video, the projection mapping software should be able to play the sound too. If you only want to have sounds, check out our sound wall tutorial.
To take your project to the next level, you could map imagery and sound simultaneously. We've seen some fantastic interactive projection mapping projects, from retail displays to student projects to tradeshow stands. Interactive projection mapping is a unique way to give viewers a self-directed experience that you can populate with fun or informative effects.
While amazing, the spatial scanner often yields a very grainy image. For complex mappings this can be a little tricky to work with. After watching a tutorial video that illustrates a technique to fill in the missing pieces of the image using some photoshop filters, I decided to take a crack at making an automated tool to patch up the spatial scanner output.
In the end, I came up with two ways of processing the scan images, one is a photoshop macro, the other is a processing sketch. They both have some specific strengths and weaknesses, but so far the processing sketch tends to sharpen up the areas of the image that are most important to me when doing projection mapping: details and edges. 2ff7e9595c
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