Barcodes for spatial markup and control
- Requires a small application running on a Series 60 phone to scan barcodes with the built in camera
- Each barcode can currently store 42 bits of data using technology modified from iris tracking and wavelet technologies (as far as I understood)
- Potential for more data by increasing the number of rings, but current setup is a compromise for low quality cameraphone cameras
- The mobile phone application can determine position of phone relative to barcode by the elliptical distortion of the circle, could perhaps be used for quite accurate tracking with multiple spots
- The phone application communicates via bluetooth or gprs, using the barcodes as triggers for interactions
- It’s coded ‘close to the hardware’ to use the video input to do barcode calculation in realtime: Java/Symbian apps don’t have an API to realtime video input
- In use commercially via Bango
Reverend Rat demoed his 10 Watt bluetooth receiver, 10 times more powerful than a 35 mile 802.11b receiver, and 100 times more powerful than a Bluetooth dongle.
Not particularly interesting in itself, but using it from a high vantage point he might be able to map out usage patterns in urban areas, or track the flow of people and devices.