Hi Gerhard, On Thursday 25 October 2007 09:57, Gerhard Schillhuber wrote: > Hi, > I'm using a Logitech Quickcam Pro for Notebooks (046d:0991) together with > OpenCV for some computer vision experiments. For camera calibration I need > several pictures of a chessboard with constant intrinsic parameters, that > means that the focus of the camera has to be constant. So I don't want > autofocus feature! > > Here my questions: > - Autofocus is by default not active and only works with the Windows > driver?
Autofocus is implemented in software on the host for current Logitech webcams. There is no autofocus for Linux. > - For Linux there is no hidden automatic change of the focus, isn't > it? Right. > - If I use the webcam without any focus adjustment, is the focus always > the same (set to infinity)? Yes. > - If I want to change the focus manually, than I have to do it by my own > in a userspace program, as mentioned in some previous posts. Right. > Is the a code snippet available? Not yet but soon :-) A userspace tool to handle vendor-specific controls is on the way. It will be announced on the mailing list. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
