Hi everyone,

I have a few questions about VSLAM. I am new to robotics and most of its terminologies so I would appreciate any references that may explain the background needed to understand your answer :)

- Can I use ROS VLSAM stack using only one camera (a webcam on my netbook to be more specific). 
- If so how do I configure VSLAM to get this to work? 
- If not, can I add another external webcam and use them as a stereo video system or do I have to purchase some commercial stereo camera? If I have to purchase a commercial system, is there any  good one for < $400 range?

Has anyone tried to get VSLAM to work with iRobot Create? I spent the last few weeks creating a reduced version of the PrairieDog stack that work without the laser range finder and the stargazer, and mapped my office using the robot's bumper sensor, only to realize that I cannot rely solely on the robot's encoders for accurate localization. 

Thanks a lot,

-M.A