Edwin Ho Posted May 22, 2014 Share #1 Posted May 22, 2014 Advertisement (gone after registration) I have downloaded a trial version of VueScan and started to scan some slides and negs. I noticed there is constantly a streak of line on the right side of the scan. This happened with every slide that I scanned and I am at a loss as how this had happened. I could have done something incorrectly. I am using a borrowed Canoscan 8800F. I look forward to advice, thank you in advance. I attach an image which I scanned a while ago. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! 1 Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/227479-need-help-with-vuescan/?do=findComment&comment=2594750'>More sharing options...
Advertisement Posted May 22, 2014 Posted May 22, 2014 Hi Edwin Ho, Take a look here Need Help with VueScan. I'm sure you'll find what you were looking for!
swamiji Posted May 22, 2014 Share #2 Posted May 22, 2014 It looks like a dead pixel. A hardware problem & nothing you can do anything about. The scanner needs service. Quote Link to post Share on other sites More sharing options...
Phil U Posted May 22, 2014 Share #3 Posted May 22, 2014 Check the glass on the scanner is absolutely clean in the calibration area. This caused me an issue once, though admittedly the problem it did not look the same as yours - it looked more like a stuck pixel in a digital image - it was thinner. Down to a piece of dust in the calibration area. Worth a check, I think. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Just to confirm - this is definitely occurring only in the scan and is not present in the negatives or slides, right? i.e. it's definitely a scan issue and not a shutter timing or light leak issue on the camera Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Just to confirm - this is definitely occurring only in the scan and is not present in the negatives or slides, right? i.e. it's definitely a scan issue and not a shutter timing or light leak issue on the camera ' data-webShareUrl='https://www.l-camera-forum.com/topic/227479-need-help-with-vuescan/?do=findComment&comment=2594765'>More sharing options...
Edwin Ho Posted May 22, 2014 Author Share #4 Posted May 22, 2014 It looks like a dead pixel. A hardware problem & nothing you can do anything about. The scanner needs service. The scanner was purchased new a few years ago but just unboxed last month. Anyway I shall keep this in mind. Quote Link to post Share on other sites More sharing options...
swamiji Posted May 22, 2014 Share #5 Posted May 22, 2014 I had a old Umax scanner that had a stuck pixel. It looked just like that, however when it warmed up, it sometimes would correct its self. Quote Link to post Share on other sites More sharing options...
Edwin Ho Posted May 22, 2014 Author Share #6 Posted May 22, 2014 Check the glass on the scanner is absolutely clean in the calibration area. This caused me an issue once, though admittedly the problem it did not look the same as yours - it looked more like a stuck pixel in a digital image - it was thinner. Down to a piece of dust in the calibration area. Worth a check, I think. [ATTACH]438172[/ATTACH] Just to confirm - this is definitely occurring only in the scan and is not present in the negatives or slides, right? i.e. it's definitely a scan issue and not a shutter timing or light leak issue on the camera You are correct, it occurs only in the scanned images (scanned from 8 different slides). Definitely not a camera/shutter issue as it appears perfectly alright via my projector. For information, I have just tested scanning two strips of negatives and they turned out alright without the "vertical streak" on the right. I am not sure if it is a problem related to the slide holder; I should know when I test it with Scangear tomorrow. I am not sure if I have applied the correct cropping... still trying to come to grips with the online instructions. I attach an image scanned from a negative, without the vertical streak on the right. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/227479-need-help-with-vuescan/?do=findComment&comment=2594873'>More sharing options...
250swb Posted May 22, 2014 Share #7 Posted May 22, 2014 Advertisement (gone after registration) The line looks a bit soft edged and full of image detail to be a stuck pixel. Perhaps a reflection? Perhaps internal dust? Steve Quote Link to post Share on other sites More sharing options...
Edwin Ho Posted May 22, 2014 Author Share #8 Posted May 22, 2014 I had a old Umax scanner that had a stuck pixel. It looked just like that, however when it warmed up, it sometimes would correct its self. Forgive me, what is a stuck pixel? Quote Link to post Share on other sites More sharing options...
swamiji Posted May 22, 2014 Share #9 Posted May 22, 2014 It's basically the same as on a LCD screen or on a camera sensor. In the scanner, you have basically two parts, the light emitter and the light receiver. The light receiver is a long strip of sensors (CCD), that gets pulled along with the light to scan your image. As in a camera a pixel is one dot, but as the carriage gets pulled along it will create a line, often red, green, or blue, but sometimes white. Quote Link to post Share on other sites More sharing options...
adan Posted May 22, 2014 Share #10 Posted May 22, 2014 A stuck pixel is one that is not responding to actual light input, but is putting out a fixed (false) amount of data at all times. A hot pixel is one that is stuck on full output regardless of the actual light received - light line in digital cameras or scanning slides, dark line when scanning negatives. A dead pixel is one that is stuck on zero output regardless of the actual light received - dark line in digital cameras or scanning slides, light line when scanning negatives. Since scans are done by sliding the pixels across the image, a single stuck pixel will produce a "scratch-like" line all along its route of travel. However, I agree with Steve that this artifact is too wide and too full of detail to be a stuck pixel. I also doubt a reflection. On glass flatbed scans, those can occur, especially with contrasty images (i.e. slides) but usually show up as a ghostly double-image of the actual picture. Question - when you scan slides, are they oriented the same way as the negative film strips? I.E. the long side of the picture aligned with the long side of the scanner bed? Or do you align them across the scanner (turned 90 degrees from that negative holder position).? 1 Quote Link to post Share on other sites More sharing options...
Edwin Ho Posted May 23, 2014 Author Share #11 Posted May 23, 2014 A stuck pixel is one that is not responding to actual light input, but is putting out a fixed (false) amount of data at all times. A hot pixel is one that is stuck on full output regardless of the actual light received - light line in digital cameras or scanning slides, dark line when scanning negatives. A dead pixel is one that is stuck on zero output regardless of the actual light received - dark line in digital cameras or scanning slides, light line when scanning negatives. Since scans are done by sliding the pixels across the image, a single stuck pixel will produce a "scratch-like" line all along its route of travel. However, I agree with Steve that this artifact is too wide and too full of detail to be a stuck pixel. I also doubt a reflection. On glass flatbed scans, those can occur, especially with contrasty images (i.e. slides) but usually show up as a ghostly double-image of the actual picture. Question - when you scan slides, are they oriented the same way as the negative film strips? I.E. the long side of the picture aligned with the long side of the scanner bed? Or do you align them across the scanner (turned 90 degrees from that negative holder position).? Thank you Andy for taking the time to explain. I shall take that in and read up a bit more on this subject. I recall shooting video with my D Lux 5 compact, there was a bright streak of light running vertically whenever there was a bright spotlight above. But I suppose this is a different subject altogether for another time. Yes the slides are oriented the same way as the scanner bed. The good news is that I have rescanned this morning and the "problem" is gone . I will share in my next post shortly. Quote Link to post Share on other sites More sharing options...
Edwin Ho Posted May 23, 2014 Author Share #12 Posted May 23, 2014 I am happy to report that my problem has gone away. Thinking it could be a reflection problem resulting from a bevelled edge on a plastic slide mount, I tested the scan with two of such slides and two other with normal cardboard mount (straight edge and not bevel). Contray to previous scan, I have all for four images minus the vertical line on the right. I must have done something right this time. Perhaps using manual crop as against auto crop, or perhaps the hardware/software was malfunctioning yesterday. I cannot pin-point the cause. I am about ready to purchase VueScan (pro version for lifetime upgrade) and RAW capability. I will scan in RAW as I have LR. And many thanks for all who responded, much appreciated. I have attached a copy of the "good" image for you to see the difference. BTW, looking at my slides taken 25 years ago with Canon T90, I am considering getting myself a manual Canon film body to go with my Canon 80-200L zoom. And why not, so to team up with the M6 for film photography, I also shoot with Canon 5D and an M9. I will eventually return the Canoscan 8800F and I am considering V700 or an appropriate Plustek model.... any suggestions? Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/227479-need-help-with-vuescan/?do=findComment&comment=2595283'>More sharing options...
Stealth3kpl Posted May 23, 2014 Share #13 Posted May 23, 2014 Unless you use medium format, I would go with the Plustek 8xxx rather than the V700. I have used both and the difference is night and day. If you use Medium Format, and can afford it, get the Plustek 120 rather than the V700. I did, and I'm very happy. Pete Quote Link to post Share on other sites More sharing options...
250swb Posted May 23, 2014 Share #14 Posted May 23, 2014 I agree, any of the Plustek 7000 or 8000 series. They are all essentially the same scanner with alternative Silverfast software bundled with it. But as you already are acquainted with Vuescan you can find heavily discounted earlier models on Ebay etc. and use them with Vuescan. The exceptions are the 7400 which doesn't have the infra red dust reduction system (I'm not sure if there was a similar model coming after that in the 8000 series), but that only degrades the image anyway, and IR can't be used with B&W at all. Steve 1 Quote Link to post Share on other sites More sharing options...
Edwin Ho Posted May 23, 2014 Author Share #15 Posted May 23, 2014 Unless you use medium format, I would go with the Plustek 8xxx rather than the V700. I have used both and the difference is night and day. If you use Medium Format, and can afford it, get the Plustek 120 rather than the V700. I did, and I'm very happy.Pete I am not into medium format don't think I can afford to spend on additional camera/lenses. Quote Link to post Share on other sites More sharing options...
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