Re: filmscanners: FW: Dual Scan II - striping
I want to clarify if the "striping" I am seeing is what Vlad is speaking of, and if anyone else sees what I am. I am seeing a couple of bands of darker sky. They start at the left side and go toward the right. One, for instance, goes right through the "Rooster" weathervane on top of the roof. Another wider one ends a bit above the rooster's head and goes up toward the top edge of the image. They are more obvious on the left side and fade out as approaching the right. These bands appear no matter what part of the screen I move the image to, and I've now looked with several different jpeg viewers. However, if this is not what Vlad is speaking of, then, Maris might have a good point. These stripes could be caused by a poorly set up monitor, certain zoom ratios in certain programs, a monitor needed degaussing, or one with magnetic materials near the screen, etc. I suggest Vlad open the image in a number of programs and see if the problem remains constant. If not, it may indeed be either software or monitor related, rather than the scanner. Art Maris V. Lidaka, Sr. wrote: Vlad, I do not see the striping. One thought comes to mind, however - is it possible that it is your monitor that shows striping but that the scanner and the image themselves are OK? Maris - Original Message - From: "Vladislav Juro" [EMAIL PROTECTED] To: "'Filmscanners (el. adresa)" [EMAIL PROTECTED] Sent: Monday, April 23, 2001 3:51 PM Subject: filmscanners: FW: Dual Scan II - striping I'm about to make the same switch. Can you explain in more detail, or show (via a small jpeg) what the striping looks like? In which direction relative to the scanning process are the stripes? Art I send you the sample to look at. I think it has something to do with temperature in the scanner - it is more apparent after several hours of scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. Something like that never occured with S20 (several thousands of negs) Vlad PS I have some problems sending the post this is 4th try-out --- Odchoz zprva neobsahuje viry. Zkontrolovno antivirovm systmem AVG (http://www.grisoft.cz). Verze: 6.0.237 / Virov bze: 115 - datum vydn: 7.3.2001
Re: filmscanners: FW: Dual Scan II - striping
Hi Vlad, I do see the striping in the sky you speak of. There are a few possibilities I can think of that could cause this. When you say the problem seems to occur as the scanner is used during a session, is it possible something other than the scanner is also heating up (like the computer motherboard or memory) which might also be causing this (for instance something in the USB circuitry)? Could there be a connection (USB cable) that might be faulty? Or perhaps the scanner lamp is either loose or faulty? Maybe it is flickering? Try tapping lightly on the scanner while it is scanning and see if you can make the banding more or less frequent. That might indicate a loose bulb or other component. I would first try to isolate the scanner and make sure it is the culprit rather than the cable of the computer itself... for instance try running the computer for several hours before turning on the scanner. If the banding starts immediately, it "might" indicate the computer being heated up is the problem. Then try it with the computer and scanner turned on the same time, and see if it takes time before the problem occurs. This will help to confirm the computer might be at fault. Change cables, or at least make sure all connections are clean and tight. If you isolate the problem to the scanner, the next step might be to simply return it for an exchange, as it is unlikely you can service the problem yourself. Art Vladislav Juro wrote: I'm about to make the same switch. Can you explain in more detail, or show (via a small jpeg) what the striping looks like? In which direction relative to the scanning process are the stripes? Art I send you the sample to look at. I think it has something to do with temperature in the scanner - it is more apparent after several hours of scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. Something like that never occured with S20 (several thousands of negs) Vlad PS I have some problems sending the post this is 4th try-out --- Odchoz zprva neobsahuje viry. Zkontrolovno antivirovm systmem AVG (http://www.grisoft.cz). Verze: 6.0.237 / Virov bze: 115 - datum vydn: 7.3.2001 STRIPING202.JPG Content-Type: application/octet-stream Content-Encoding: base64
Re: filmscanners: FW: Dual Scan II - striping
At 01:42 AM 24/04/01 -0700, you wrote: I want to clarify if the striping I am seeing.. Yes, I see exactly the same effect in the same places, but quite subtle. If you run an eyedropper over the areas, you can see a small variation in the RGB numbers to back it up. So neither of you are hallucinating (or maybe it's spreading!). So my bet would be perhaps a slight variation in illumination evenness? That might be a hard one to fight as a warranty issue.. Or.. I have also encountered a similar, although much more well-defined, problem where another electronic item was interfering with the scanner - Have you tried relocating the scanner and its cables, perhaps even trying the SCSI card in another slot, if applicable.. Good luck. :)
RE: filmscanners: FW: Dual Scan II - striping
I want to clarify if the striping I am seeing is what Vlad is speaking of, and if anyone else sees what I am. I am seeing a couple of bands of darker sky. They start at the left side and go toward the right. One, for instance, goes right through the Rooster weathervane on top of the roof. Another wider one ends a bit above the rooster's head and goes up toward the top edge of the image. They are more obvious on the left side and fade out as approaching the right. I see the same striping that Art sees. For those not seeing the broad stripes, do a histogram equalization (optional - just makes the effect much more obvious) and look at the separate color channels. No stripes are visible in the red or green channels but they are quite visible in the blue. My first impression was that the stripes were due to saturation of the bright weather vane but I don't think this one image is enough to determine the real cause. They are definitely not JPEG artifacts.
Re: filmscanners: FW: Dual Scan II - striping
Good, I'm glad I haven't fully lost it yet ;-) Two comments. 1) I did some deconstruction of the jpeg image Vlad sent, and the banding is almost completely in the blue channel... always a weak point in CCD scanners. 2) The Minolta Dimage Dual Scan II is a USB product, no SCSI interface card involved. Art Mark T. wrote: At 01:42 AM 24/04/01 -0700, you wrote: I want to clarify if the striping I am seeing.. Yes, I see exactly the same effect in the same places, but quite subtle. If you run an eyedropper over the areas, you can see a small variation in the RGB numbers to back it up. So neither of you are hallucinating (or maybe it's spreading!). So my bet would be perhaps a slight variation in illumination evenness? That might be a hard one to fight as a warranty issue.. Or.. I have also encountered a similar, although much more well-defined, problem where another electronic item was interfering with the scanner - Have you tried relocating the scanner and its cables, perhaps even trying the SCSI card in another slot, if applicable.. Good luck. :)
filmscanners: FW: Dual Scan II - striping
I'm about to make the same switch. Can you explain in more detail, or show (via a small jpeg) what the striping looks like? In which direction relative to the scanning process are the stripes? Art I send you the sample to look at. I think it has something to do with temperature in the scanner - it is more apparent after several hours of scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. Something like that never occured with S20 (several thousands of negs) Vlad PS I have some problems sending the post this is 4th try-out --- Odchoz zprva neobsahuje viry. Zkontrolovno antivirovm systmem AVG (http://www.grisoft.cz). Verze: 6.0.237 / Virov bze: 115 - datum vydn: 7.3.2001 attachment: STRIPING202.JPG
Re: filmscanners: FW: Dual Scan II - striping
Vlad, I do not see the striping. One thought comes to mind, however - is it possible that it is your monitor that shows striping but that the scanner and the image themselves are OK? Maris - Original Message - From: "Vladislav Juro" [EMAIL PROTECTED] To: "'Filmscanners (el. adresa)" [EMAIL PROTECTED] Sent: Monday, April 23, 2001 3:51 PM Subject: filmscanners: FW: Dual Scan II - striping I'm about to make the same switch. Can you explain in more detail, or show (via a small jpeg) what the striping looks like? In which direction relative to the scanning process are the stripes? Art I send you the sample to look at. I think it has something to do with temperature in the scanner - it is more apparent after several hours of scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. Something like that never occured with S20 (several thousands of negs) Vlad PS I have some problems sending the post this is 4th try-out --- Odchoz zprva neobsahuje viry. Zkontrolovno antivirovm systmem AVG (http://www.grisoft.cz). Verze: 6.0.237 / Virov bze: 115 - datum vydn: 7.3.2001
Re: filmscanners: FW: Dual Scan II - striping
Vlad wrote: scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. I don't understand how a scanner artifact could be out of focus. I've seen wide bands on a SS4000 scan but only when I pushed the brightness of a dark scan *really* hard by masking it with an inversion of itself. Rob Rob Geraghty [EMAIL PROTECTED] http://wordweb.com
Re: filmscanners: FW: Dual Scan II - striping
on 4/23/01 2:51 PM, Vladislav Jurco at [EMAIL PROTECTED] wrote: I'm about to make the same switch. Can you explain in more detail, or show (via a small jpeg) what the striping looks like? In which direction relative to the scanning process are the stripes? Art I send you the sample to look at. I think it has something to do with temperature in the scanner - it is more apparent after several hours of scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. Something like that never occured with S20 (several thousands of negs) Vlad PS I have some problems sending the post this is 4th try-out --- Odchozí zpráva neobsahuje viry. Zkontrolováno antivirovy´m systémem AVG (http://www.grisoft.cz). Verze: 6.0.237 / Virová báze: 115 - datum vydání: 7.3.2001 Do you see the striping when you print it? -Berry
Re: filmscanners: FW: Dual Scan II - striping
Like Art I see broad soft-edged stripes of dark and lighter sky - quite obvious - with for example a dark stripe through the cock. It looks to me like an illumination issue, but this doesn't seem likely for a film scanner. I had very bad striping with my (now returned) Photosmart which was a kind of aliasing of scanner noise with the screen display - it varied enormously depending on degree of displayed zoom, but was sharp edged, not like what I see here. Julian At 08:35 24/04/01, you wrote: Vlad, I do not see the striping. One thought comes to mind, however - is it possible that it is your monitor that shows striping but that the scanner and the image themselves are OK? Maris - Original Message - From: Vladislav Jurèo [EMAIL PROTECTED] To: 'Filmscanners (el. adresa) [EMAIL PROTECTED] Sent: Monday, April 23, 2001 3:51 PM Subject: filmscanners: FW: Dual Scan II - striping I'm about to make the same switch. Can you explain in more detail, or show (via a small jpeg) what the striping looks like? In which direction relative to the scanning process are the stripes? Art I send you the sample to look at. I think it has something to do with temperature in the scanner - it is more apparent after several hours of scanning. Stripes are along the frame movement direction they are not sharp but blurred, typically dark green in blue area, wide app. 10-15% of frame width. Something like that never occured with S20 (several thousands of negs) Vlad PS I have some problems sending the post this is 4th try-out --- Odchozí zpráva neobsahuje viry. Zkontrolováno antivirovým systémem AVG (http://www.grisoft.cz). Verze: 6.0.237 / Virová báze: 115 - datum vydání: 7.3.2001 Julian Robinson in usually sunny, smog free Canberra, Australia
