I am using OpenCV 2.4.6 on a Windows 8 64 bit machine using VS2012 c++/cli with two MSFT LifeCam 3000HD web cams. I am able to calibrate the cameras using the calibrateCamera function.
Because you do not want to have to perform calibration every time (and the values should not change), it makes sense to store the computed values for each camera, which should be unique to that camera (i.e., two cameras of the exact same make and model will likely have different distortion values).
I am wondering how, if at all, people are uniquely identifying cameras so that they can load calibration values specific to that camera between sessions. For example, suppose two cameras are calibrated and then, before the next session, one is disconnected. In the next session, how would you know which calibration values apply to the camera that remains connected?