Re: filmscanners: Comparison of LS2000 and LS4000
Thanks for this really interesting comparison. I am impressed by the roc/gem technology, especially by this example of gem (grain reduction). Of course we expected some grain reduction anyway because of the 4000dpi (which I think the LS4000 scans at even at the lower resolutions that were used in the examples) and indeed there is some improvement without GEM. But gem as well makes this very grainy film look good! It is hard to tell from this example how much softening there is - I can see some apparent softening but this may be fixable with different settings or a bit of sharpening. ROC - colour reconstruction - has changed the image a lot. My guess is that the original was daylight film with tungsten light in which case ROC has done an arguably good job. Now too cool, but I am sure I would find it easier to adjust for good skin tones from the ROC'd version than the original. Thanks again for the insight, Julian At 05:26 01/05/01, you wrote: http://www.starhk.com/peterpen/nikontest.htm Includes: - Sample scans from same frame using LS2000 and LS4000 (not full res) - Sample using GEM/ROC - Pictures of the LS4000 internals - hand measured scan times with various features on/off Julian Robinson in usually sunny, smog free Canberra, Australia
RE: filmscanners: Noise correction algorithms
I already asked this question to Ed and later to this list, all some time ago. Ed replied that his algorithms were of course already doing such a thing. Then I asked, where can you set the threshold on black (slides) or white (negs) for what is considered to be dust and waited... (no answer to that question). This reminded me that I should put only one question in a mail (ironically that was even Ed's suggestion to me, even longer ago), since then it clearly shows both parties that the other person is not answering / missing that question. But that is getting OT. I noticed that the HP S20 software was able to paint e.g. in red all pixels that were being clipped by current histogram mapping settings. To me this seemed a handy feature, but no other software took over that idea. It seems that if you can show the user which data is being clipped or is being considered pixels-to-be-cleaned cq, IR-opaque-pixels, the user would be able to precisely control if the correct pixels are cleaned. This would be a good feature for any owner of a filmscanner without IR. Small problem is that you have to do a full-resolution pre-view, and the big problem is... well, unknown to me, but known to Ed and other software manufacturers. Perhaps it has to do with patents, but what I hear is 'click-toot-toot...' and since I hear that often I wonder: does anybody understand what I am trying to get at? Bar Bar applying to the civilized greeks ;-) -Original Message- From: Lynn Allen [SMTP:[EMAIL PROTECTED]] Sent: Saturday, April 28, 2001 5:00 PM To: [EMAIL PROTECTED] Subject: filmscanners: Noise correction algorithms This question is for Ed, and any other program-savy people who want to answer. Since dust is always white on negs and always black on slides, while noise is usually lighter and grain is usually darker than the surrounding field of pixels, is this or can it be considered in the cleaning algorithms? This suddenly seems so obvious as I experience the problems more, and I wonder what I'm missing that it isn't more easy to deal with. (?) Example: red pixels in sky colors, when it isn't sunset, green pixels in skin-tones and shadow tones at mid-day. It's very perplexing, because I'm pretty sure my scanner or its software is actually seeing or at least interpreting those pixels. I could, of course, be wrong, but that's how it looks to me. Best regards--LRA --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
Re: filmscanners: Fuji Xtra 800 and 400 settings for Vuescan?
In a message dated 4/30/2001 4:10:16 PM EST, [EMAIL PROTECTED] writes: I'm going to try the new negative (with 4th layer) from Fuji : Xtra800, but which settings should I use in Vuescan? The Kodak Advantix settings seem to work well with the newer Fuji emulsions. Regards, Ed Hamrick
RE: filmscanners: Cleaning slides
-Original Message- From: Lynn Allen [SMTP:[EMAIL PROTECTED]] Sent: Saturday, April 28, 2001 2:41 PM To: [EMAIL PROTECTED] Subject: Re: filmscanners: Cleaning slides Art wrote: These same companies that immediately offer free repairs or replacement when a product doesn't meet functionality after minimal usage? To their everlasting credit, Acer *does* in fact replace, rather than repair, defective Scanwits with new ones. At least in the US, as I know firsthand. [Oostrom, Jerry] I have my Acer scanner sent in for service, but here in Holland they had not heard about a replacement programme. In fact they are trying to repair my defective one. And they are until now unable/unwilling to see the problem of the scanner: background noise, devastating for negatives in general or the dark part of slides. Luckily they are still testing for the problem, but I was disappointed when I saw their sample scan, which of course looked good: the scan was cropped to 29x14mm (ratio 2:1), whereas I scan full-frame 36x24mm (ratio 3:2). I said they probably didn't do a full frame scan and thereby unintentionally left out the parts of the CCD line/array that are failing, they responded that they performed a full frame scan. Then I responded: how strange, look at the ratios, the dpi etc... Now I am waiting for their answer... It is terrible: they are friendly, very willing to help and I want to keep it that way, but it sure is hard to explain such an apparently elusive problem to them while minimizing the risk of offending them on how they test my scanner. [Oostrom, Jerry] :-(
Re: filmscanners: Noise correction algorithms
In a message dated 5/1/2001 2:20:15 AM EST, [EMAIL PROTECTED] writes: This reminded me that I should put only one question in a mail (ironically that was even Ed's suggestion to me, even longer ago), Yes, this maximizes the chances that someone will answer the question. I learned long ago that when I wanted a specific answer to a specific question, I should limit the e-mail request to that specific question. 10-paragraph e-mails with questions buried within the fourth paragraph generally won't get responses to the buried questions. Regards, Ed Hamrick
RE: filmscanners: Noise correction algorithms
At 09:16 AM 1/05/01 +0200, Jerry wrote: .. I noticed that the HP S20 software was able to paint e.g. in red all pixels that were being clipped by current histogram mapping settings. To me this seemed a handy feature, but no other software took over that idea. It seems that if you can show the user which data is being clipped or is being considered pixels-to-be-cleaned cq, IR-opaque-pixels, the user would be able to precisely control if the correct pixels are cleaned. This would be a good feature for any owner of a filmscanner without IR. It certainly would.. Small problem is that you have to do a full-resolution pre-view Why not a *tiny* full-resolution preview?!? Thumbs Plus has had this feature for years - when saving JPEGs, a small part of the full-res image appears in a scrollable preview window. You can flip from original image to compressed version instantly to see the effects of different compression levels, and of course you can also scroll it to view whatever area you want. A great feature that I don't see very often, but I would like to! ..I wonder: does anybody understand what I am trying to get at? I think I do, so there is at least one.. :) MT. P.S. Ed, if you're listening, when are you going to at least tell us you're *thinking about* separating the grain reduction and dust/scratch algorithms? :)
Re: filmscanners: Noise correction algorithms
In a message dated 5/1/2001 5:06:45 AM EST, [EMAIL PROTECTED] writes: Ed, if you're listening, when are you going to at least tell us you're *thinking about* separating the grain reduction and dust/scratch algorithms? :) I haven't thought about the implications of this yet. I'm up to my elbows in adding support for the HP 7400c right now (a 2400 dpi flatbed that I got delivered this morning) and fixing the frame offset problem with the Nikon LS-40/LS-4000 (Nikon loaned me an LS-40 again yesterday). Regards, Ed Hamrick
RE: filmscanners: Noise correction algorithms
Beautiful reply with masterful selection of original text serves to prove your and my point! ;-) -Original Message- From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]] Sent: Tuesday, May 01, 2001 10:34 AM To: [EMAIL PROTECTED] Subject: Re: filmscanners: Noise correction algorithms In a message dated 5/1/2001 2:20:15 AM EST, [EMAIL PROTECTED] writes: This reminded me that I should put only one question in a mail (ironically that was even Ed's suggestion to me, even longer ago), Yes, this maximizes the chances that someone will answer the question. I learned long ago that when I wanted a specific answer to a specific question, I should limit the e-mail request to that specific question. 10-paragraph e-mails with questions buried within the fourth paragraph generally won't get responses to the buried questions. Regards, Ed Hamrick
Re: filmscanners: Noise correction algorithms
I have used a HP s20 myself, and I found this feature very useful. I noticed that the HP S20 software was able to paint e.g. in red all pixels that were being clipped by current histogram mapping settings. To me this seemed a handy feature, but no other software took over that idea.
filmscanners: Msg repeats (was:Scan for television screen
Rob wrote: there must be some other problem with the mailing list? Definitely seems to be a problem on the Net, somewhere. My ISP is definitely limping too, so it's hard to say what the source is. But it's in there somewhere. --LRA --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
Re: filmscanners: Negatives vs. slides in new scanners
JimD wrote: Based on the results I'm getting with Provia I'll be using it more,I'll just teach the dogs to be stationary. If you can expand your teaching methods to include kids and publish them on CD or VCR, you'll become a rich man! :-) Best regards--LRA --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
Re: filmscanners: OT: Film lengths was: Cleaning slides (PEC tips)
So the conclusion is - don't try to squeeze out an extra frame or two? Maris - Original Message - From: Laurie Solomon [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, May 01, 2001 11:07 AM Subject: RE: filmscanners: OT: Film lengths was: Cleaning slides (PEC tips) | I pay and have paid for and expect 36 exposure for many, many years - | everything over and above that is a gift. | | While that is not in question; what often is in question is the fact that | given the shorter lengths of leader any attempts to squeeze that extra frame | out of the film often leaves no room for the processor to attach things like | processing clips for dip and dunk, leader tape for roller processing, or | drying clips if the film is hung up to dry as in the case of black and white | films done in custom labs. As a result those extra frames frequently are | damaged in one way or another due tot he mechanics of processing and the | need for a frame or two of open space at either end. Many people think that | because they can squeeze an extra frame or two on the roll - gift or not - | they should be able to expect to get the image on those extra frames back | undamaged as if they were within the normal range of frames for that roll, | be it 12, 24, 36 exposures. | -Original Message- | From: [EMAIL PROTECTED] | [mailto:[EMAIL PROTECTED]]On Behalf Of Maris V. Lidaka, | Sr. | Sent: Monday, April 30, 2001 11:30 PM | To: [EMAIL PROTECTED] | Subject: Re: filmscanners: OT: Film lengths was: Cleaning slides (PEC | tips) | | | I pay and have paid for and expect 36 exposure for many, many years - | everything over and above that is a gift. | | Maris | | |
Re: filmscanners:ss4000_overexposed negatives
Info; which settings do you work with to get details from an overexposed bw negative scanned on a polaroid ss4000??? Thank you henri
RE: filmscanners: Exposure in VueScan
Dana-- Just for fun, try scanning that over-exposed slide as a neg and then inverting it. I'm not saying it *will* work, but sometimes it *does*. The exposure values, of course, will go in the oposite direction. Best regards--LRA --Original Message-- From: Dana Trout [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: May 1, 2001 7:13:17 PM GMT Subject: filmscanners: Exposure in VueScan Ed, I came across an anomoly that I would like to understand better. I am using the following equipment: VueScan 7.0.15 Polaroid SprintScan 4000 Win98 SE I was scanning a very thin (overexposed) slide with autoexposure turned ON. I decided to try to eak out a little more detail from the blown-out highlights and turned autoexposure OFF and noticed that it had set the exposure to 0.902. I changed the exposure value to 0.75 and got the same results. I changed the exposure to 0.5 and still got the same results. However, for any exposure value greater than unity I do see the brightness increase as the exposure is increased. It appears that any exposure value less than unity gives the same scan as an exposure value of unity. Is this expected? Thanks, --Dana --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
