Unwrapping images of cylindrical objects


Here’s an automated setup that lets you create flat images of cylindrical objects. The example shown above takes a creamer and lets you see what the painted pattern looks like when viewed continuously.

The image capture rig is similar to turntable photography setups that allow you to construct animated GIF files or 3D models of objects. The subject is places on a stepper motor which allows precise control when rotating the object between frames. The EiBotBoard (which we’ve seen in at least one other project) is designed for the EggBot printer. But it is used here to interface the motor and capture equipment with the Raspberry Pi.

We’re a little uncertain if the RPi actually handles the image manipulation. The project uses ImageMagick, which will certainly run on the RPi. There is a mention of the Raspberry Pi camera joing the rig as a future improvement so we do expect to see a fully-automatic revision at some point.

[via Adafruit via EMSL]

RGB LED cylinder

[Dave Clausen] from NYC Resistor sent in his open source RGB LED cylinder. We have seen many cubes in the past (even one that display low-res 3D video) so a cylinder is certainly a new concept and the RGB LEDs are a nice upgrade. The LEDs are wired in a 5-way multiplexed grid using four TLC5940NTs (16 channel LED drivers with internal PWM hardware) so each light is individually addressable. The best thing about this project, of course, is that he has source and EAGLE schematics availbale for download and both are licensed under Creative Commons.

[via NYC Resistor]


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