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#51
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difficulty drum scanning negatives
Jytzel wrote:
Gordon Moat wrote in message ... Jytzel wrote: Thanks for all who responded. I got the scans from the office and they look horrible. I donīt think itīs grain, ítīs noise, noise, noise! Colors look posterised with no gradation observed. The histogram shows no abnormalities however (?) That comment makes me think you are viewing it on a monitor, and judging it as noise. A smooth Histogram should indicate a smooth tonal transition. The reasoning behind drum scanning is to eventually print the image. I think at this point, you should do a test print, proof print, or match print, and then make a better judgement. I don't believe the problem is the film, it's the scan that it's bad. If anybody is interested I can send portion of the image for viewing. J All monitors are such poor resolution in comparison to printing, especially commercial offset printing. I have seen many image files that seemed noisy on a monitor, yet printed very smoothly. You could easily be running into a limitation of viewing on a monitor. If you can do a test print, then you would have a better item to judge scan quality. If it still looks bad, then the original scan is at fault. If you still find that after viewing printed results that things are not working, it is then down to operator error, or a weird technical problem. I remember working on one workstation that showed unusual results on most scans. What we finally traced that down to was an extra monitor interfering with the SCSI cable of the scanner, and causing strange noise issues. The reason that was so tough to track was that the monitor was a secondary monitor, and not always used at that workstation. Routing the SCSI cable further from that monitor solved the unusual noise problem. While I would be surprised if that is the problem you are having, if nothing else is working, then investigate that direction. Best of luck. Ciao! Gordon Moat A G Studio http://www.allgstudio.com Thanks Godon, But why donīt all photos show noise then? The ones scanned from positives are perfect. If it was just a monitor limitation then it would affect all scanned images, right? I think there has been some good information in this thread, some things that need to be done as part of the process: Print the scan at 8 x 10 Get a chemical print made, also at 8 x 10 anything that appears in the digital print, that isn't in the chemical print, is noise introduced by scanning. Often it's easier for a scanner operator working at a photo shop or service bureau to fault the process, rather then take the time to adjust and repeat, until they get it right. Paul |
#52
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difficulty drum scanning negatives
Jytzel wrote:
. . . . .Thanks Godon, But why donīt all photos show noise then? The ones scanned from positives are perfect. If it was just a monitor limitation then it would affect all scanned images, right? J Hard to give you a good answer without seeing the differences, but here is an attempt. I have usually seen more problems with negatives than positives in scanning and viewing. The scanners do a conversion of the negative issue, and are usually functionally better performing with positives. It could be in the conversion, noise was introduced into the negative scan. Obviously, other factors during the scan could still be issues. Just another guess at this, but I have had better luck scanning B/W negative films as colour positive, and then inverting in PhotoShop or LivePicture. It seems that the more subtle tonalities get picked up better, compared to setting the scanner at the colour or monochrome negative settings. Ciao! Gordon Moat A G Studio http://www.allgstudio.com |
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