[HUG ] Re: IMG: Triptych

To get a RAW file from a scanner using Vue Scan, you have to buy the pro version of Vue Scan, then select that the file be written as a DNG (Digital NeGative) which tells Vue Scan to ignore all of the Vue Scan pre-sets and just write the 'raw' scanner data to the file. This is a true raw file in DNG format. It's purpose is actually for re-scanning the same image but without putting the film into the scanner. You scan the DNG file, which comes into Vue Scan as if it came from the scanner, with Vue Scan pre-sets set to the way you want them, and then get a TIFF or JPEG, or whatever, with the changes that you want. This presumes that you use Vue Scan as your image processor.
So... Vue Scan DNG is truly RAW scanner data! No firmware or software tweaks, only the gathering of the bits and putting them into a file in DNG format.
For me, it's much easier to get the picture that you want via LR or PS rather than trying learn all of the nuances of a scanner program. I'll take my digital images RAW! 

Jim


On Mar 17, 2009, at 5:16 PM, Austin Franklin wrote:


Hi Franc,

But...as both Marc and I pointed out, there is no such thing as a
standardized "raw" file format, but as I've pointed out, they can be saved as TIFFs. And, taking you up on your suggestion, what it appears from the Vuescan's manual, is that it saves these "raw" files with a .tif extension:
"• In the Output tab un-check all the options except for Output > Raw file 
As each image is scanned, files with sequential numbering such as
scan0001.tif,
scan0002.tif, etc. will be created."

"To re-process these raw files:
• Set the Input > Source option to File, and set Input > Files to point to 
the starting file
in the series (eg scan0001.tif)"
So, at least with Vuescan, these "raw" files are saved as TIFFs, and there 
is, obviously, no loss of data with these TIFF files.

Regards,

Austin


-----Original Message-----
From: hasselblad-bounce@xxxxxxxxxxxxx
[mailto:hasselblad-bounce@xxxxxxxxxxxxx]On Behalf Of Franc Flipsen
Sent: Tuesday, March 17, 2009 6:10 PM
To: hasselblad@xxxxxxxxxxxxx
Subject: [HUG ] Re: IMG: Triptych
I have a epson V700 and a minolta scan multi II and they both save in raw 
format using Viewscan and infact you can save as raw from any
scanner with
viewscan, Maybe you should check it out at www.hamrick.com .
I've also used
it with a polaroid sprintscan 45. I can get a 48bit multi-pass scan from 
all of these scanners.  Of course they need to be saved as raw
files or you
loose information in conversion to a tiff file format.

Franc


----- Original Message -----
From: "Austin Franklin" <austin.franklin@xxxxxxxxxxx>
To: <hasselblad@xxxxxxxxxxxxx>
Sent: Tuesday, March 17, 2009 4:48 PM
Subject: [HUG ] Re: IMG: Triptych



Hi Franc,


I think the point he is trying to make is that when you scan or
capture if
you save it in Raw you get what the sensor saw at the time and if
you save
it to a tiff, dng or some other format you discard some of the
data.


Sure, but that is not true with TIFF when talking about a

scanner, which

is
what I was questioning.


tiff
is a lossless format when opened but some of the data (not

needed by the

tiff file format)is stipped off the file before it is saved


Like what data?  If any data is "stripped" that is implementation
dependant.
I have a few scanners that save TIFF, and that is THE raw data

format for
these scanners. These TIFFs are typically called "HDR" for High Dynamic 
Range.  IOW, they have no setpoints or tonal curves

applied...so the image
you see if you were to open the file up in, say, PS, will be typically 
very
dark...until you apply setpoints and tonal curves to "normalize" it.


...so
the tiff file
does not contain all the data the sensor saw but a raw file does
contain all
the data the sensor saw and nothing else, not even a color

space profile.


Well, that's not necessarily true.  At least with the scanners I've
designed
and the ones I have. To save a "raw" file with any of my scanners, you 
save
it as a TIFF file, with no setpoints or tonal curves set. TIFF does not 
define a "color space profile".
What scanner do you have that saves files as "raw" and it's not HDR or 
TIFF?

Regards,

Austin




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