|Type||Master thesis presentation|
|Title||3D Pointer Using Stereo Imaging|
|Abstract||Today, there are several advanced stereo imaging devices able to
detect the 3D position of an object (or even of a hundred objects!),
but for prices at around 50000 SEK and up. It should be possible to
produce a product for only a 100th of that price, that can detect a
3D position for pointing purposes in 3D images, similar to how a mouse
can point in 2D.
The goal of this master thesis project is to produce a low budget 3D pointer with two standard webcams connected to a normal PC.
By filtering out visible light and using an IR diode as pointer, the position in the images are determined with thresholding and connected component labeling followed by a camera calibration. A 3D position is calculated from the two 2D images with a home made geometric solution.
The result is a VC++ program that delivers new 3D coordinates in a user defined coordinate system every 25 ms. Despite the webcam's low resolution a relatively high precision is achieved. The performance is demonstrated in a 3D graphics engine.