On Tuesday 28 August 2007 11:32, Dr. techn. Alexander K. Seewald wrote: > On Tue, Aug 28, 2007 at 01:14:51AM +0200, Laurent Pinchart wrote: > > There are two things to implement in Linux to get something similar. The > > first one is to implement manual focus into the driver. This shouldn't be > > difficult and I'll have a go at it. The second one is much more complex. > > You'll have to come up with a userspace image processing algorithm to > > compute focus values from the video. I have no experience with that. > > I'll visit my brother today, who happens to have an WinXP machine > lying around. Perhaps the manual focus will stay in the same setting even > when disconnected, which would instantly solve my problem.
It probably will (although I'm not sure about it). > If you need some USB traces during manual focus control by the windows > application, just let me know (& tell me which tools to use, I've never > done this before ;-) This shouldn't be necessary, I should be able to get the necessary information. Thanks for the offer anyway. > For my application, manual focus control would be sufficient. But I'll > see whether there are some published approaches in the image processing > literature for autofocus which could be ported... the trick is > probably to get a fast "in-focus" estimate on each image and change > the focus in the right direction until it reaches a maximum value. A high-pass filter followed by a simple pixel sum could be a simple estimate. Might not be good enough, but worth a try. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
