Pen Writing on Multi-touch Table with SGDriver

For more detailed information about OpenMT and SGDriver, please visit :
http://openmtproject.sourceforge.net

Systems used:
* Multi-touch table: FTIR multi-touch table
* Pen: IR Pen (Nib type)
* Track touch points: CCV
* Pen recognition: SGDriver gets multiple touch points from CCV and select a single touch point as a pen with a simple recognition logic.
* Send corresponding Windows messages: appropriately assign WM_LBUTTONDOWN, WM_MOVE, WM_LBUTTONUP.

Why pen writing?
* We just want to write on our MT table. That's all :)

Why pen writing with SGDriver?
* We tested CCV + MTVista for pen writing but didn't get satisfactory results. We concluded that a separate pen recognition algorithm is required.

TODOs
1. Palm rejection is not perfect. It works only for the right-handed and may not work when two hands are on the surface.
2. SGDriver cannot recognize pen and multi-touch at the same time. For this, the recognition algorithm should be highly improved. It may need a sort of pattern recognitin algorithm
3. SGDriver sends out mouse messages. However, in the future version, it should sends out digitizing tablet messages like Wacom tablet. Unfortunately, we can't find appropriate APIs for digitizing tablets.

Category:

Science & Technology

Tags:

• OpenMT
• SGDriver
• Multi-touch
• CCV
• Pen Computing
• Touch screen