Digital BW, The Print

I'll post this in the group since it might be of interest to others:

I use a Canon CanoScan FS4000US scanner. You could have a copy of my
action, but there's not much to it, and it might be specific for my
scanner, so here's the procedure instead:

1. Scan the image as 64bit RGBI TIFF in Vuescan. This produces a 48 bit
image with an additional 16bit IR channel.

2. Select IR channel in photoshop.

3. Apply Auto levels without clipping.

4. With my scanner the lighter part of the histogram contains excessive
noise and streaks with a ghostlike copy of the image. Clip this
information by setting the white point in levels. For me that's about
185.

5. Invert the channel.

6. Convert to 8bit.

7. Go back to RGB/Grayscale channel and load a selection from the IR
channel.

8. Use the Patch tool in 'Source' mode and drag the selection to a
dust-free part of the image.

That's it!


A couple of things:

- You might want to expand the selection by 3-5 pixels before applying
dust removal

- Step 8 is not perfect and could be replaced by another dust removal
procedure. When you drag the selection using the patch tool you
sometimes end up using data from a part of the image that's too
different resulting in weird artifacts. If you find something that works
better, please let me know. Thanks!


--
Daniel Staver
http://daniel.staver.no

film cleaner works remarkably well too.

Thanks, just working through your flow now but I don't seem to get an 
IR channel in PS7.  I am scaning B&W negs using a Nikon CS IV through 
Vuescan with 64 bit RGBI and no IR correction but only 3 channels are 
shown in PS and the file size is similar to a normal 3 channel scan.  
What am I missing?  Is it because you can't scan IR through Ag negs?

Thanks

Gareth

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Daniel Staver" 
<daniel@p...> wrote:
> I'll post this in the group since it might be of interest to others:
> 
> I use a Canon CanoScan FS4000US scanner. You could have a copy of my
> action, but there's not much to it, and it might be specific for my
> scanner, so here's the procedure instead:
> 
> 1. Scan the image as 64bit RGBI TIFF in Vuescan. This produces a 48 
bit
> image with an additional 16bit IR channel.
> 
> 2. Select IR channel in photoshop.
> 
> 3. Apply Auto levels without clipping.
> 
> 4. With my scanner the lighter part of the histogram contains 
excessive
> noise and streaks with a ghostlike copy of the image. Clip this
> information by setting the white point in levels. For me that's 
about
> 185.
> 
> 5. Invert the channel.
> 
> 6. Convert to 8bit.
> 
> 7. Go back to RGB/Grayscale channel and load a selection from the IR
> channel.
> 
> 8. Use the Patch tool in 'Source' mode and drag the selection to a
> dust-free part of the image.
> 
> That's it!
> 
> 
> A couple of things:
> 
> - You might want to expand the selection by 3-5 pixels before 
applying
> dust removal
> 
> - Step 8 is not perfect and could be replaced by another dust 
removal
> procedure. When you drag the selection using the patch tool you
> sometimes end up using data from a part of the image that's too
> different resulting in weird artifacts. If you find something that 
works

> better, please let me know. Thanks!
> 
> 
> --
> Daniel Staver
> http://daniel.staver.no

Check that "64bit RGBI" is set as "TIFF file type" as well as "Bits per
pixel" in the input and output tabs. I'm not sure why the setting is in
two places but I always have both switched on.

You won't be able to get a good IR channel from BW films unless they are
chromogenic C41 BW films like Ilford XP2. I think you'll still get a
channel though, it just won't contain any useful information.

I'm using a Canon FS4000US scanner, I'm not sure what the results will
be like on other scanners.

--
Daniel Staver
http://daniel.staver.no 

> -----Original Message-----
> From: garethlock4472 [mailto:gareth.lock@...] 
> Sent: 29. mai 2003 00:17
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Re: Action to remove dirt and dust
> 
> 
> Thanks, just working through your flow now but I don't seem to get an 
> IR channel in PS7.  I am scaning B&W negs using a Nikon CS IV through 
> Vuescan with 64 bit RGBI and no IR correction but only 3 channels are 
> shown in PS and the file size is similar to a normal 3 channel scan.  
> What am I missing?  Is it because you can't scan IR through Ag negs?
> 
> Thanks
> 
> Gareth
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Daniel Staver" 
> <daniel@p...> wrote:
> > I'll post this in the group since it might be of interest to others:
> > 
> > I use a Canon CanoScan FS4000US scanner. You could have a 
> copy of my 
> > action, but there's not much to it, and it might be specific for my 
> > scanner, so here's the procedure instead:
> > 
> > 1. Scan the image as 64bit RGBI TIFF in Vuescan. This produces a 48
> bit
> > image with an additional 16bit IR channel.
> > 
> > 2. Select IR channel in photoshop.
> > 
> > 3. Apply Auto levels without clipping.
> > 
> > 4. With my scanner the lighter part of the histogram contains
> excessive
> > noise and streaks with a ghostlike copy of the image. Clip this 
> > information by setting the white point in levels. For me that's
> about
> > 185.
> > 
> > 5. Invert the channel.
> > 
> > 6. Convert to 8bit.
> > 
> > 7. Go back to RGB/Grayscale channel and load a selection 
> from the IR 
> > channel.
> > 
> > 8. Use the Patch tool in 'Source' mode and drag the selection to a 
> > dust-free part of the image.
> > 
> > That's it!
> > 
> > 
> > A couple of things:
> > 
> > - You might want to expand the selection by 3-5 pixels before
> applying
> > dust removal
> > 
> > - Step 8 is not perfect and could be replaced by another dust
> removal
> > procedure. When you drag the selection using the patch tool you 
> > sometimes end up using data from a part of the image that's too 
> > different resulting in weird artifacts. If you find something that
> works
> > better, please let me know. Thanks!
> > 
> > 
> > --
> > Daniel Staver
> > http://daniel.staver.no
> 
> 
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As you may know I've been refilling 2100 cartridges with MIS Ultratones
for a while now and more recently also their 7600 archival color inks.
When I just used the Ultratones I got mottling in shadow areas of my
prints on glossy papers, and I thought this was due to some interaction
between the light black and the dark cyan, and the fact that the inkset
hasn't been tested for this printer.

However, now I get the exact same problem with their 7600 archival color
inkset, and they claim this should be compatible with the 2100 and also
work great on glossy papers. Since I get the same problem with both
inksets I'm beginning to suspect that the problem might not be with the
inks themselves, but with my refilling process.

I'm using the vacuum refill methos as described on this page:
http://www.anestoday.com/epson2200/replete2.htm

Can the fact that I'm rinsing old cartridges with water be the problem?
Could there be residual water in the cartridges that's mixing with the
inks and somehow causing these problems? In that case, shouldn't the
problem have gone away already with my Ultratone cartridges as they've
been refilled twice after rinsing already? I'm careful to blow air
through the cartridge after rinsing to clear out any leftover water.

I think the problem I've mentioned with roller marks on glossy papers
can be partly because of this. 

I get consistently prefect nozzle checks and good prints on matte
papers.

Any suggestions on what I might be doing wrong?

--
Daniel Staver
http://daniel.staver.no

Dear Daniel,
I'm a lurker on the BW printing list and have just seen your site and would like to commend you on your work. It's great and inspiring.

I shoot almost totally BW (only 35mm due to lack of money). I'm about to do a major update of my photos site, many of the photos of which I am no longer happy with - which is a good sign of progress.

I'm interested that you're using a Canon FS400U - are you pleased with it? I have heard that it has some quality control issues (some people love it, others hate it) and that it can't extract shadow detail from slide film. But I shoot 90% BW (Ilford Pan F at present), so that might not be so much of an issue. But if you want to sell your work, slides are preferred for colour, so that may be a consideration.

Any thoughts?

Keep up the good work, anyway.

best wishes,
Richard

   ph: 64-9-422 6615
   mailto:r.smallfield@...
   http://photos.smallfield.vze.com (photos)
   http://smallfield.vze.com (homepage)

   "The significant problems we face cannot be solved at
   the same level of thinking we were at when we created
   them." 
   --Albert Einstein (1879-1955)