I read about the still image mode before but is it really anything special? Some sources indicate that it just grabs a frame from the video stream. The request is either made by the webcam software or by pressing a snapshot button. Sure I can program but is it worth all the troubles? The main advantage would be improved image quality.
Thanks, Roderick -----Original Message----- From: Brandon Philips [mailto:[EMAIL PROTECTED] Sent: Tue 4/15/2008 10:37 PM To: Colenbrander, Roderick Cc: [email protected] Subject: Re: [Linux-uvc-devel] High resolution webcam + USB 1.1 (LX832) On 12:54 Tue 15 Apr 2008, Colenbrander, Roderick wrote: > First of all not much webcams offer high resolutions. Logitech has a > bunch of those (e.g. QPC 9000 Pro / Sphere AF) and most others I found > from Trust, Hercules seem to use the Microdia chipset which doesn't > have an opensource driver yet. Does someone have other suggestions for > webcams that offer good image quality and if possible a high > resolution? I can't make any specific recommendations but the Logitech cameras seem to perform well. > Another issue is of course that I'm limited to USB 1.1. I don't think > the bandwidth is much of a problem as I don't need much images and > don't need them frequently either. Second jpeg compression is fine by > me (but I would like to be able to adjust the compression parameters). > Does USB 1.1 somehow limit the resolution of the pictures I can take? > I can imagine that the buffer size is smaller than the max image it > can take and that USB2 is fast enough to empty it before data gets > overwritten. All of the Logitech cameras I own can do up to 800x600 on USB 1.1. You probably won't do much better than that without going to a Hi-Speed bus. It could be possible to get a higher resolution on 1.1 by using the STILL_IMAGE_FRAME mode of UVC depending on the camera you use but that isn't implemented in the Linux UVC driver yet. If you want to implement it that would be great :) Cheers, Brandon ##################################################################################### Disclaimer Deze email en alle hiermee verzonden bestanden zijn vertrouwelijk en alleen bestemd voor diegene aan wie de e-mail is geadresseerd. Indien u ten onrechte deze email heeft ontvangen waarschuw dan de systeembeheerder. ([EMAIL PROTECTED]) Deze voetnoot bevestigt dat deze email is gecontroleerd op aanwezigheid van computer virussen. Disclaimer This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager ([EMAIL PROTECTED]) This footnote also confirms that this email message has been swept for the presence of computer virusses. ##################################################################################### ##################################################################################### This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal ##################################################################################### _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
