Hi Forrest, first of all, sorry for the late reply.
On Monday 29 September 2008, Forrest Vodden wrote: > Hey all, > > I realize this is the development list for uvc, but couldn't find a > mailing list for uvccapture and felt that maybe you would have some > insight into my problem. No worries. You did well. > I'm using a Logitech Quickcam Communicate Deluxe in USB 1.0 mode to > avoid the Logitech bug that I've had trouble with in the past. I'm > scripting uvccapture to capture a 640x480 image every 5 seconds. > > This works great for 90% of the pictures taken, but every once in > awhile the photo's exposure is off the charts. I've tried locking the > exposure in using the uvccapture option, which helped, but it still > happens. The camera is outside, so it has to deal with natural light > variances, but this still happens on generally dark, overcast days. > > Is this probably a camera issue and should I looks into other > brands/models or is there anything on the software side that I could > try? Here's an answer I got from Logitech after forwarding your issue (kudos to them for providing great technical support) : "It sounds like the user is scripting multiple launches of uvccapture, i.e. a "start stream, take snapshot, stop stream" sequence every 5 seconds. In that case the camera probably does not always have time to adapt the exposure time properly when the stream starts. In general it's not a good idea to restart the stream so often because of the time it takes for the algorithm to settle. I would suggest using uvccapture -t, in that case it shouldn't happen." Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
