Mirror Image

Mostly AR and Stuff

Augmented Reality Tower Defense game is up for download

It’s here. In this demo I’ve used the same multimarker tracker I’ve used in last demos. 3d position of the camera calculated form markers used for placing tower. Third dimension used to control tower height
If you don’t know what Tower Defense is, here is wiki entry

15, November, 2008 Posted by | Augmented Reality, Mobile, Nokia N95, Symbian | , , , , , , , , , | Comments Off on Augmented Reality Tower Defense game is up for download

To filter or not to filter

Time-domain smoothing filter is somehow controversial question in image registration. The video is inherently smooth, necessity of time-domain smoothing is usually sign of instability of image registration algorithm. Taking average for several frames is especially notorious. Ideally good, stable algorithm don’t need any smoothing in time-domain. However what to do if there is small jittering in otherwise stable and fast real-time algorithm. Just couple of pixel in amplitude, it’s not noticeable on the big virtual objects, but on small, especially stretched or linear objects it’s quite noticeable. I have found that at least in my case, simple, several frames, smoothing filter remove jittering and is not causing any visible alignment artifacts.

9, November, 2008 Posted by | Augmented Reality, Coding AR, Mobile, Symbian | , , , , | Comments Off on To filter or not to filter

Phone camera as 3d pointing device

Here is a short video how phone camera could be used as precise enough 3d pointer.
This demo use the same engine as my first demo.

3, November, 2008 Posted by | Augmented Reality, Coding AR, Mobile, Nokia N95 | , , , , , , | 2 Comments

A new demo in the work

This one would be less about usage real-world objects, more about phone camera as 3d mouse.

29, October, 2008 Posted by | Augmented Reality, Coding AR, Mobile, Nokia N95 | , , , , , | Comments Off on A new demo in the work

Nokia E50, E51 camera API – strange

For some reason crushing on

SetExposureL
SetDigitalZoomFactorL
SetContrastL

Though they should always by supported…

.

28, October, 2008 Posted by | Coding AR | , , | Comments Off on Nokia E50, E51 camera API – strange