Re: Nikon LS-30/Vuescan questions (Updated)

[Håkon T Sønderland]

Bruce Roberts wrote:
> 
> 4. If the grain is still a big problem try using the Nikon Scan software. I
> find that with really dark or contrasty shots the Nikon software can perform
> better than VueScan. On the other hand VueScan is better on lighter shots in
> many cases. I can't explain this but if you are not happy with a particular
> scan try using the other software.
> 

I originally couldn't get the Nikon Scan software to work.
A complete uninstall and registry cleanup and re-install fixed this.

The Nikon Scan software does make an impressive difference. 
I've uploaded the the images to my original page:

http://www.core.no/~hts/photos/scanning.html

The colour balance also seems completely different on the two
files, with the Vuescan having a distinct red/orange tint.

I don't know what Nikon Scan is doing, I might well be som sort
of blur, but if it is it isn't very noticable in the image to
my eye.

Maybe Ed could do the same with Vuescan?

When installing the Nikon Scan software v 2.5.1 i noticed this in 
the readme:

"4.2. Noise problem when Digital ICE on
Occasionally a strange noise pattern appeared around the edge 
of an image when you used Digital ICE. 
Now this pattern has been reduced."

I can see this noise quite clearly when using Vuescan, but
nothing shows with Nikon Scan.  Ed?

Thanks for the tip Bruce.

Haakon


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Re: Nikon LS-30/Vuescan questions (Updated)

[EdHamrick]

In a message dated 9/17/2000 5:55:25 PM EST, [EMAIL PROTECTED] writes:

> "4.2. Noise problem when Digital ICE on
>  Occasionally a strange noise pattern appeared around the edge 
>  of an image when you used Digital ICE. 
>  Now this pattern has been reduced."

This is a different problem they're talking about.  What they're
describing is at the boundary between the slide mount and the
film.  It's not what you're seeing.

What you're seeing is caused by two things:

1) NikonScan smooths the image when using ICE.  You
   actually lose image detail when this is turned on.  Use
   VueScan's "Scrub" filter to do smoothing (in 6.1).

2) NikonScan gets a color shift when using ICE.  Compare
   the colors both with and without ICE in NikonScan, and
   with cleaning on and off in VueScan.  You'll see that there
   are big color shifts in NikonScan and no color shifts in
   VueScan.

The noise you're seeing is the same in VueScan both with
and without cleaning.  It's just normal film grain.

Regards,
Ed Hamrick


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Colour shifts with filters (was Re: Nikon LS-30/Vuescan questions (Updated))

[Rob Geraghty]

<[EMAIL PROTECTED]> wrote:
> 1) NikonScan smooths the image when using ICE.  You
>actually lose image detail when this is turned on.  Use
>VueScan's "Scrub" filter to do smoothing (in 6.1).

As it happens, I was looking at several different crops I made
from the same raw data file this evening.  The vuescan dust
removal filters do indeed progressively defocus the image.
This in turn masks the aliasing.

>with cleaning on and off in VueScan.  You'll see that there
>are big color shifts in NikonScan and no color shifts in
>VueScan.

The weird thing is that in the comparison I mentioned above,
I noticed colour shifts - at least shifts in brightness - even though
the only thing I did between each scan was change the filter
selected.

I don't think the shifts are a real problem, but something is going
on.  However, what I *did* want to say is that vuescan's cleaning
filters offer a method of reducing grain by slightly defocussing
the image.  I tried comparing no filter with the same image
after the scrub filter followed by unsharp masking in PSP.
The image with unsharp masking was of similar focus to the
unfiltered image, but with the advantage of less grain.

The attached jpeg shows the result of the different filters at 1:1
2700dpi from the LS30.  The film is Konica 100VX.  If you
really *like* grain, try the sharpen filter! :)

The image is a section of Bob Murphy's suggested target,
photographed at 2m using a Pentax MZ5 with a Sigma
28-80 zoom lens at 28mm.  F6.7,1/90s, +1EV.

Rob

PS Yes, I realise it's not perfectly straight, however I didn't
want to introduce more errors by rotating it!



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 konica filtered.jpg