[HUG ] Re: IMG: Triptych

I stand corrected.

Franc
----- Original Message ----- From: "Austin Franklin" <austin.franklin@xxxxxxxxxxx> 
To: <hasselblad@xxxxxxxxxxxxx>
Sent: Tuesday, March 17, 2009 6:16 PM
Subject: [HUG ] Re: IMG: Triptych


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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