Rear Projection Touch Screen – Change in Form

The biggest hurdle during this period of work concerned the form of installation. During the previous seminar meeting I brought up my concern about the shadows cast by users and how they could be awkward and tough to avoid. It also became apparent that when someone walks over the projected map, the tweet may not appear in the direction that they’re facing. Based on suggestions from group members, I’ve slightly altered the form of installation. Instead of exhibiting my grad project as an interactive floor projection, it’ll now take the form of a large screen with rear projection and touchscreen capabilities.

I’ve built a small prototype of the screen, with a wooden frame and white cloth stretched across it. The fabric chosen for this prototype is approximately 25% nylon. I’ve chosen a material with lots of stretch to it, so that it can be pulled tightly around the wooden frame, but still have enough stretch that there’s some give when someone touches it.

Prototype Screen      Prototype Screen 2

I will use the super short throw projector to project the image onto the back of the screen. Since this projector sits on the ground, and projects the image upwards at an angle, there won’t be a significant hotspot. The rear projection also eliminates any problems with shadows.

The Kinect sensor will be positioned behind the screen, picking up the changes of depth when someone touches the screen.

Screen Shot
Tweets appear on the map and effect the sentiment profile assigned to each area


Screenshot from the ISMA Meet - A tweet about the project made it onto the screen
Screenshot from the ISMA Meet – A tweet about the project made it onto the screen

The next stage of work consists of getting the kinect to work with the program, and testing the functionality of the touchscreen.

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