FWIW
You can't. A memory lapse on my part. If you check No Color Correction on the Configuration page, then you lose the manual control on the first page including Levels.How do you adjust the B&W points in Epsonscan with No Color Correction selected?
Post 99 answered in post 105.Please answer the question in post 99.
Stouffer 21 step transmission/projection step wedge. Each band from 1 to 21 is a .15 increase in density, scanned at flat/default to show what the scanner produces without enhancements or multipasses.
I would like to see the same of other makes of scanners.
https://www.stouffer.net/TransPage.htm
Comparative tests like this are meaningless. Without knowing what settings you're using, it proves nothing. It would be like saying that one post processing program is better than another but not knowing that it is using shadow lightening slider while the other does not use the same control in it's program even though it's available.Site space editing removed the spaces that had the epson scan under the left pair and vuescan raw on the right pair.
Vuescan's exposure gives 2 steps more but steps 1 - 5 are not as sharp as epsonscan.
How do you adjust the B&W points in Epsonscan with No Color Correction selected?
Please answer the question in post 99.
https://www.stouffer.net/TransPage.htm
Ted, Some people have claimed that when using Epsonscan, you can get more bits in the scan results for the areas actually containing data bits if you set the black and white points into where the histogram ends. I've doubted that suggestion for years wondering if just allowing the full 0-255 scan would provide the same resultant scan. Do you have any knowledge about this?Shuttfinger, there are no manual controls that influence the way the epson scanner scans when using epson scan. The exposure control is completely automatic, all the software controls BP, WP, contrast, colour. etc are effectively post controls, that can be done in epson scan or later in something else. You can of course use those software controls to make a irreversible mess (clip all the values etc, reduce to 8bit before corrections have been made etc)…
Ted, Some people have claimed that when using Epsonscan, you can get more bits in the scan results for the areas actually containing data bits if you set the black and white points into where the histogram ends. I've doubted that suggestion for years wondering if just allowing the full 0-255 scan would provide the same resultant scan. Do you have any knowledge about this?
Dear Gents, I wasn't going to post more images here, but I'm worried about banding in the following image. I also have a scan by a professional developer, and it too shows banding, so I don't think it's the scanning process, although that might have exacerbated it. Your thoughts appreciated.
Sorry if it's not clear to me. But does it make a difference to adjust the levels before the scan or not or just scan flat without any adjustments at all?If you stay at 16bit and don't clip then no data or precision of that data is lost. This is not the case if you save with 8bit, and may not be case for other devices, it is certainly not the case for a device that uses a log amplifier, like found in an older drum scanner. If you work in 16bit you can move the numbers around to your hearts content but there are no fractions and the range is 0 to 65535.
However it is important to consider in particular if you are scanning a negative that the software is using an algorithm to simulate a photographic print, and how BP and WP might affect that algorithm...
One comment about the film. Make sure it's flat before using in the Epson scanner's holder. I processs all my MF film in a lab and they return it cut into 2, 3 or 4 image lengths and insert them in glassine strips to protect them. But the main thing is they get it to me flat with no curl.
Sorry if it's not clear to me. But does it make a difference to adjust the levels before the scan or not or just scan flat without any adjustments at all?
If you stay at 16bit and don't clip then no data or precision of that data is lost. This is not the case if you save with 8bit, and may not be case for other devices, it is certainly not the case for a device that uses a log amplifier, like found in an older drum scanner. If you work in 16bit you can move the numbers around to your hearts content but there are no fractions and the range is 0 to 65535.
However it is important to consider in particular if you are scanning a negative that the software is using an algorithm to simulate a photographic print, and how BP and WP might affect that algorithm...
I don't think this is the best way to check the full range of scanner.
You should find a way to mask the areas of non importance like the clear base of the transparent film and let the scanner only analyse the lightest/darkest patches with the rest in between then we can see what is the real range capability.
Nice shot and scan. 6x6 allows 4 strips of three. With my (10) 6x7's, they usually give me 3-3-2-2..Cheers, Alan. I'm now using blackandwhitefilmprocessing dot co dot uk, who send them in four glassine strips of three shots, which is perfect for scanning. The first batch arrived today, and here's the first scan.
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