xsane settings for negatives
Gavin Cameron
Last night I was trying to scan some negatives into xsane (not that it
matters, but an Epson Perfection 1660 photo scanner).
The thing is it's a Polaroid 35mm film. I tried all of the different
settings for negatives (normal, kodak, fuji etc) and none of them give
the correct colours from the negative.
Does anyone know / have any settings for polaroid negatives.
I tried looking at the xsane and sane web sites as well as a quick
Google (it was getting late by this point last night) but could find
anything :-(
TIA,
Gav.
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Justin C
> Hi all,
>
> Last night I was trying to scan some negatives into xsane (not that it
> matters, but an Epson Perfection 1660 photo scanner).
>
> The thing is it's a Polaroid 35mm film. I tried all of the different
> settings for negatives (normal, kodak, fuji etc) and none of them give
> the correct colours from the negative.
>
> Does anyone know / have any settings for polaroid negatives.
>
> I tried looking at the xsane and sane web sites as well as a quick
> Google (it was getting late by this point last night) but could find
> anything :-(
If it's C41 then it should be the same as any other colour neg film
(allowing for manufacturer variances). It certainly shouldn't be far
enough out that the colours aren't correct (I can understand minor
variation but, if I understand you correctly, these are way out). Are
you sure it's not neg film that's been put through slide processing?
Could the film stock be very old? Been exposed to a lot of heat - in the
glove box of a car for a few summer days?
I've not used xsane so I don't know the settings for normal, kodak, fuji
but my guess would be that these just adjust the balance slightly for
known variances in that manufacturers film but these variances tend to
be quite minor in the scheme of things, not bad enough (generally) to
cause people to write posts to newsgroups (unless it is a photographic
newsgroup!).
Looking at Polaroid's site, they don't list that they make a 35mm film.
Maybe it's APS?
Justin.
--
Justin C, by the sea.
Stephen Patterson
> The thing is it's a Polaroid 35mm film. I tried all of the different
> settings for negatives (normal, kodak, fuji etc) and none of them give
> the correct colours from the negative.
>
> Does anyone know / have any settings for polaroid negatives.
What about scanning them in the colour they actually are and using
gimp or imagemagick to invert them?
--
Stephen Patterson http://patter.mine.nu/
steveSPAM@.patter.mine.nu remove SPAM to reply
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Ian G Batten
Justin C <justi...@purestblue.com> wrote:
> In article <40e900d3$1...@baen1673807.greenlnk.net>, Gavin Cameron wrote:
> > Hi all,
> >
> > Last night I was trying to scan some negatives into xsane (not that it
> > matters, but an Epson Perfection 1660 photo scanner).
> >
> > The thing is it's a Polaroid 35mm film. I tried all of the different
You mean, I presume, polaroid-branded C41 negative film? There was a
weird Polaroid _instant_ 35mm slide stock, but I doubt that's what you
mean.
> If it's C41 then it should be the same as any other colour neg film
The base stocks can be somewhat different. A quick check would be to
compare the colour of the sprocket area with a negative which scans OK.
Failing that, in extremis you'd have to use Photoshop to correct the
colours based upon known-white and known-black points in one.
ian
Gavin Cameron
The film in question comes from this exact camera which he bought in Argos:
It was only bought a few days ago and processed yesterday. The photos
turned out perfectly, so nothing wrong with the negative itself. He just
forgot to ask them to digitise the images onto a CD, so he's scanning
them in, but I thought I may get better results scanning the negatives.
Basically, the "standard negative" looks way too yellow/brown. All
others just get too distorted in other colours. I'm sure I could
manually play with adjusting the RGB brightness/contrast to get a good
representation, but it'll take time :-(
Cheers anyway,
Gavin Cameron
> On Mon, 05 Jul 2004 08:23:48 +0100, Gavin Cameron wrote:
>
>>The thing is it's a Polaroid 35mm film. I tried all of the different
>>settings for negatives (normal, kodak, fuji etc) and none of them give
>>the correct colours from the negative.
>>
>>Does anyone know / have any settings for polaroid negatives.
>
>
> What about scanning them in the colour they actually are and using
> gimp or imagemagick to invert them?
It's not just a case of straight inversion (xsane can do this anyway),
but the subtlties between different negative films. I'd still have to
play around to get the colour balance right. Sure, given time I would
get it, but I thought I'd try to see if there are any other presets
available for xsane.
Cheers,
Gavin Cameron
If you check another reply, there's a link to the camera which is a
Polaroid waterproof disposable camera, so I'm asuming Polaroid film?!?
Never thought about setting white and black spots. I'll give that a
whirl tonight!
Cheers,
Bill Unruh
]On Mon, 05 Jul 2004 08:23:48 +0100, Gavin Cameron wrote:
]> The thing is it's a Polaroid 35mm film. I tried all of the different
]> settings for negatives (normal, kodak, fuji etc) and none of them give
]> the correct colours from the negative.
]>
]> Does anyone know / have any settings for polaroid negatives.
]What about scanning them in the colour they actually are and using
]gimp or imagemagick to invert them?
Negatives always have a orange tint to them, which must be subtracted out.
Otherwise you will get an (complement of orange) tint to the picture.
However you could use gimp to determine the colouring of the negative (ie
some of the colours will not range from 0 to max in colours, but rather
have a base and a max which do not cover the full range. Use gimp to
determine them and then set up xsane to use them.
)
Bill Unruh
No, it is the base of the colours that are different. If in gimp you do
Left click on the image, and then Images->colors->levels.
you get the range of colours on the scanned image. You will probably find
that one of RGB does not start at 0 or does not extend to the top of the
range. Pull the appropriate cursor so it does.
Remember the values.
You can set up iscan to use those values.
Richard Stonehouse
from Gavin Cameron <gavin....@baesystems.wibble.com> contains these words:
> Does anyone know / have any settings for polaroid negatives.
> I tried looking at the xsane and sane web sites as well as a quick
> Google (it was getting late by this point last night) but could find
> anything :-(
I know you're asking about xsane, but could Vuescan
(http://www.hamrick.com) be an acceptable alternative? Used to be free
of charge for non-commercial use, though I think that may have changed.
I spent many hours scanning some old Kodacolor negatives in xsane and
Image Scan! - repeated trial scans, gradually inching towards a decent
colour balance - with mediocre results. Vuescan, on its default
settings, got them nearly right first time - so close that it wasn't
worth meddling with the settings in Vuescan; the remaining adjustments
are small enough to do in the Gimp without losing significant
information.
I see it does have settings for some Polaroid films built in, though the
normal strategy is - I think - just to use the "generic colour film"
settings and let Vuescan figure out the colour balance.
--
Richard Stonehouse
Justin C
>
> The film in question comes from this exact camera which he bought in Argos:
>
> http://www.argos.co.uk/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=1751&productId=95190
>
blue to them if they were... though how that'll appear in negative I
couldn't say (being colour blind and all).
> Basically, the "standard negative" looks way too yellow/brown. All
> others just get too distorted in other colours. I'm sure I could
> manually play with adjusting the RGB brightness/contrast to get a good
> representation, but it'll take time :-(
Maybe you can save the adjustment you make to one as something like a
photoshop action so you can apply it to each image once scanned? Or
maybe xsane allows you to add your own settings so you've not only got
normal, kodak, fuji, but also 'my setting'.
Good luck with it.
Gordon Henderson
Richard Stonehouse <ric...@stonehouse.invalid> wrote:
>The message <40e900d3$1...@baen1673807.greenlnk.net>
>from Gavin Cameron <gavin....@baesystems.wibble.com> contains these words:
>
>
>> Does anyone know / have any settings for polaroid negatives.
>
>> I tried looking at the xsane and sane web sites as well as a quick
>> Google (it was getting late by this point last night) but could find
>> anything :-(
>
>I know you're asking about xsane, but could Vuescan
>(http://www.hamrick.com) be an acceptable alternative? Used to be free
>of charge for non-commercial use, though I think that may have changed.
I think it's been $40 for a long time - all the 2.5 years I've been
using it anyway...
>I spent many hours scanning some old Kodacolor negatives in xsane and
>Image Scan! - repeated trial scans, gradually inching towards a decent
>colour balance - with mediocre results. Vuescan, on its default
>settings, got them nearly right first time - so close that it wasn't
>worth meddling with the settings in Vuescan; the remaining adjustments
>are small enough to do in the Gimp without losing significant
>information.
Sane didn't support my slide/neg scanner at the time which is why I went
down the VueScan route. It works really well for me and give excellent
results, so have no reason to change now.
>I see it does have settings for some Polaroid films built in, though the
>normal strategy is - I think - just to use the "generic colour film"
>settings and let Vuescan figure out the colour balance.
Or scan some unexposed film in and send it to Ed and I think he can
create an update from that (not 100% sure though)
Gordon
Gavin Cameron
> Hi all,
>
> Last night I was trying to scan some negatives into xsane (not that it
> matters, but an Epson Perfection 1660 photo scanner).
>
> The thing is it's a Polaroid 35mm film. I tried all of the different
> settings for negatives (normal, kodak, fuji etc) and none of them give
> the correct colours from the negative.
>
> Does anyone know / have any settings for polaroid negatives.
>
> I tried looking at the xsane and sane web sites as well as a quick
> Google (it was getting late by this point last night) but could find
> anything :-(
Thanks for all the replies guys, I'll play around with your suggestions
tonight.
Last night as I was playing, I managed to get the desired result (near
enough anyway). I left the "medium definition" set to full colour range
and simply unselected the "RGB default" and then selectected "Negative"
followed by "Auto Enhancement"
It was then just a case of tweeking the gamma values to get a better result.
As a comparison, I'll try scanning the image in its "raw" negative form
and alter the levels in the GIMP.
Cheers again,
Richard Stonehouse
from gor...@this-is-valid-but-a-spam-trap.drogon.net (Gordon Henderson)
contains these words:
> >I know you're asking about xsane, but could Vuescan
> >(http://www.hamrick.com) be an acceptable alternative? Used to be free
> >of charge for non-commercial use, though I think that may have changed.
> I think it's been $40 for a long time - all the 2.5 years I've been
> using it anyway...
I believe it may have been a temporary experiment, but when I downloaded
VueScan 7.6.80 for Linux a few months back it was free of charge for
educational and home use. Don't know if that version is still available
and whether it's still FOC. Failing that, IIRC correctly, it's a credit
card purchase which rules it out for some of us.
--
Richard Stonehouse