Supplementing my old message it has more information in the site. They are minimum information more of the one to know the Multi-Function. http://www.brother.com/as_oc/fax/info/mfc7300c/mfc7300c_spe.html -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20051207/aa367b1e/attachment.html From pie...@pirsoft.dnsalias.org Wed Dec 7 11:47:19 2005 From: pie...@pirsoft.dnsalias.org (Pierre Willenbrock) Date: Wed Dec 7 11:47:11 2005 Subject: [sane-devel] Genesys backend update to Dec 06, cvs In-Reply-To: <1133946400.4396a620c0...@webmail.cloudnet.com> References: <1133946400.4396a620c0...@webmail.cloudnet.com> Message-ID: <4396cbc7.9090...@pirsoft.dnsalias.org>
Gerald Murray schrieb: > Hi all, > > # These tests results are using sane-backends-20051206-cvs: > > GL841 - Canoscan lide35: > > This has changed for the worse since Nov 24. > I have previously made scans at 150, 300, 600, in color. > Now the 'image' is no longer recognizable. > Not recognizable means color noise? Last time i tested my Canoscan lide35 worked for me. Please try scanimage, and if the problems persist, send a log with SANE_DEBUG_GENESYS=255 and SANE_DEBUG_GENESYS_GL841=255. When using these environment variables, you should get a file named black_white_shading.pnm in your working directory. As both the log and the image are pretty large, please compress them, and send them directly to me, not to the list. Better put them on some webspace, where i can download them. I can deal with e-mail larger than 10mb, but i prefer downloading it somewhere. > color, 75dpi, (scan fails, obtaining 0 feed steps, then stops) > > color, 150dpi (unrecognizable image created) > warmup(?) is very odd. > move head, wink lite, park head <-repeated several times. > Usually a warmup would keep the light on, move to strip, scan, rescan if > necessary. I am not sure where this is coming from. > flag GENESYS_FLAG_SKIP_WARMUP is still there. > The LiDE scanners don't need a warmup. What you are seeing is the calibration process. It should look like this: - move home(currently missing, but not critical) (head is now on black strip) - do multiple single line scans to calibrate analog offset - move to white strip - do multiple single line scans to calibrate analog gain - move home - move to white strip - do multiple single line scans to calibrate exposure time per color - move home - do multiple single line scans to calibrate analog offset - move to white strip - do multiple single line scans to calibrate analog gain - move home - scan full calibration area for shading calibration - move home Calibration should theoretically only be done once, but it is far easier to do it before every scan. > color, 300dpi - SAME as 150dpi > > color 1200dpi - Very slow, backtracks 195 times on a 107mm scan length. > image size was 100 megabytes, for about 1/3 of the available scan area. > (Note: using usb 1.1 fullspeed, not hi-speed) > What do you expect? usb 1.1 fullspeed means 11mbit/s or about 1mb/s. Not counting the overhead from checking the scanners state. In 1200dpi mode the scanner potentially delivers about 5 million pixel components per second. I am measuring about 2.5 million pixel components per second. The scanner buffers data, but needs to do backtracking if the buffer runs full. The image size is normal. Your image contains about 50 million pixels, making about 150 megabytes. Regards, Pierre
