RWY-16
Topic Author
Posts: 103
Joined: Fri Dec 29, 2000 1:18 am

How To Work On Scans?

Fri Aug 31, 2001 5:12 pm

Hi

Having a good picture is one thing, making a good scan is another. As I start to try my first scans, my question goes to those who have high quality pics here.

Admitted you have a great slide, with top colors and top sharp, what do you do to get good pictures, for example for airliners.net. The things I am looking for are how to sharpen and how to manipulate colors, how to work with saturation and color tones.

Any comments appreciated.

Thanks in advance.

Kind regards, Andi
 
cfalk
Posts: 10221
Joined: Mon Dec 04, 2000 6:38 pm

RE: How To Work On Scans?

Fri Aug 31, 2001 5:18 pm

First, we need to know what tools you have available. You say you are using slides - that's good.

What kind of slide film do you use?

Do you have a slide scanner or a flatbed scanner? What type?

What kind of photo-editing software do you have?

Charles
The only thing you should feel when shooting a terrorist: Recoil.
 
RWY-16
Topic Author
Posts: 103
Joined: Fri Dec 29, 2000 1:18 am

RE: How To Work On Scans?

Fri Aug 31, 2001 5:42 pm

Hi

I used KR64, but switched to Fuji Provia 100F a few months ago. The slides are absolutely sharp. I checked them with a 11x lupe.

Currently I let some friends make the scans on different slide scanners (Nikon and Minolta). I get the raw scans and work on them with Photoshop LE. I am planning to get myself a slide scanner. It will most probably be a Nikon.

Kind regards, Andi
 
cfalk
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RE: How To Work On Scans?

Fri Aug 31, 2001 6:02 pm

I'm not familiar with Photoshop LE, so I'll let someone else who is give you pointers on that. Here are my suggestions.

I find that the Nikon scanners scan Provia extremely well. If your friend has a CD-ROM writer, have him make raw TIFF scans of 10-20 MB each. This should give you plenty of leeway if you want to crop down, or if you want to zoom in on something like a small registration number. If you have to use floppy disks, you're rather limited.

With the original image, rotate the picture if you need to to get things level, and crop the picture so that the plane is "flattered" the most. Apply any color balancing, contrast adjustment, saturation, etc. at this point.

Resize the image to 1024 pixels across, maximum 768 pixels high.

Use the Unsharp Mask to sharpen the picture as much as possible, without allowing the picture to get grainy, or that edges start getting jagged. Pay special attention to the sky and dark areas like engine intakes, as those areas seem to start going grainy first.

If some areas are starting to become grainy, but other areas could still use some sharpening, use masks to selectively sharpen these areas.

Save the file in jpg format, with no compression. the file should be in the range of 500-600 KB.

Collect all appropriate info on the aircraft, and upload.

Cheers,

Charles
The only thing you should feel when shooting a terrorist: Recoil.
 
gerardo
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RE: How To Work On Scans?

Fri Aug 31, 2001 6:34 pm

I also work with Photoshop LE, which was given as bundle with my Minolta Scan Dual II scanner.

I have heard so far two differet opinions about unsharp mask. One was to use it BEFORE resizing, other say, AFTER resizing. I use it sometimes before AND after, but mostly only after the resizing.

As for the colors, I use mostly "adjust color tone" and "gradation" (hope, the spelling is correct, in German it is "Gradationskurve"). Anyone uses other featues?

Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
gerardo
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RE: How To Work On Scans?

Sat Sep 01, 2001 7:49 pm

Another question:

do you prefer raw scans, or do you let adjust the scan software color, or sharpness?

Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
OO-VEG
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RE: How To Work On Scans?

Sat Sep 01, 2001 9:31 pm

CFALK: you said photo's should be saved with a size of 500-600kb. But most high-quality pics I see around here are less then 200kb.

How is that possible?
 
AviationIvi
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OE-VEG

Sat Sep 01, 2001 9:40 pm

OE-VEG: you should upload them with no compression as Charles said. Later they will be compressed again I think and will get a lower file size when Johan adds the copyright stuff and saves them as jpg again.
Regards
Ivica
 
martin21
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RE: How To Work On Scans?

Sun Sep 02, 2001 2:24 am

The slide film you use is one of the best there is. Fuji has the most natural colors and the Provia (F) is a Profesional film. The scanner I use is the Minolta Dimage Scan Dual II, this one is not as good as Nikon scanners but a lot cheaper (and well worth his price). I scan my picts in at 12bit so when I correct them in Photoshop 6.0 there is not much information lost. When I have completed the corrections (color and brightness) I convert the pict. to 8bit to Sharpen it, after that I resize it to 1024 and save it as an JPEG with no compression. I hope I have give you enought info ?!
At 30.000 feet, the sun always shines !
 
gerardo
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RE: How To Work On Scans?

Sun Sep 02, 2001 5:19 am

Martin21, I have the same scanner. How do you scan with 12 bit? Do you use the original scan software?

Regards
Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
paulc
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Martin21

Thu Sep 06, 2001 3:56 pm

I would also be interested to know how you scan in 12bit and convert to 8bit - i have the same Minolta scanner. However even using the highest scanner settings i still get far too many rejections with "scan quality low" message and it is very frustrating.

I also use Photoshop to "adjust" contrast/colour etc and shapen feature to get what i consider the best image - question - do you use the sharpen before or after resizing to 1024 ? i have been trying various options but still get the same old rejection messages

any help would be appreciated
English First, British Second, european Never!
 
jwenting
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RE: How To Work On Scans?

Thu Sep 06, 2001 3:58 pm

Minolta software will output 8 or 16 bit, never 12.
I wish I were flying
 
gerardo
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RE: How To Work On Scans?

Thu Sep 06, 2001 8:50 pm

I normally use Unsharp mask after the resizing. However, sometimes I use Unsharp Mask before resizing and after resizing again just a little bit.

Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
AndyEastMids
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RE: How To Work On Scans?

Thu Sep 06, 2001 9:32 pm

Paulc,

i have the same Minolta scanner. However even using the highest scanner settings i still get far too many rejections with "scan quality low" message and it is very frustrating

I find that strange as I also use the Minolta scanner and I have had no rejects at all (so far!) due to scan quality.

Firstly, I use VueScan rather than Minolta's software as I couldn't get results that I liked with Minolta's twain driver - colours were always wrong IMHO, whilst VueScan's white balance setting gives me results I like off Kodachrome 64.

As best I can recall (I'm not at home now and haven't done any scanning for four weeks or more due to a holiday), I scan at max resultion to a TIF file. I then go into Photoshop and do an unsharp mask (no idea what settings without checking), resize to 1000 x 660 (ish) and then, only sometimes, tinker with the unsharp mask again - depends on how the image looks after resizing. Occasionally I do a few other things like masking and despeckling, but it depends on what I see on the screen. Lastly I save as a high quality (10) JPG which gives me a file of 600-700k to upload.

I hardly ever (if ever?) use the Photoshop sharpen tool as I find it too agressive, and I prefer to play around with the Photoshop unsharp mask and its settings. I also hardly ever touch the contrast/colour or gamma stuff as I usually find the raw scanned results are fine for my tastes.

As I said, its worked for me so far.

Andy
 
gerardo
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RE: How To Work On Scans?

Fri Sep 07, 2001 12:54 am

Thanks very much Andy

I would even offer you a cold one, if would tell me, which settings you use for unsharp mask befor and after resizing  Smile/happy/getting dizzy.

Oh, BTW, this cold one would be waiting for you at ZRH.

Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
AndyEastMids
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RE: How To Work On Scans?

Fri Sep 07, 2001 1:11 am

Gerado,

Not a problem. I promise I'll fire up the scanner when I get home tonight and check. I'll add to this topic again later.

Andy

PS: I know Zurich quite well and might just be tempted to come back one day. I worked in the Swissair office in Balsberg for almost two years (Oct 1996-Oct 1998), commuting each week from the UK. Spent much time watching the heavy SR 743s scrape off the end of the runway through the office windows, plenty of evenings downtown, and many nights at the airport Movenpick or Swissotel in Oerlikon!
 
AndyEastMids
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RE: How To Work On Scans?

Fri Sep 07, 2001 5:56 am

OK,

The unsharp mask settings I currently have in Photoshop LE are

Amount: 70%
Radius: 1.0
Threshold: 40

I know I've changed these values from time to time, usually when I have a picture I'm not too happy with, in which case I just tinker with the numbers until I see a result I'm happy with, but at the moment these values work for me.

Andy
 
gerardo
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RE: How To Work On Scans?

Fri Sep 07, 2001 3:47 pm

Andy

Thanks very much, and as promised, the cold one is waiting for you.  Smile/happy/getting dizzy I wasn't aware, that you were almost a "ZRH insider".

I see, that you use a different approach with Unsharp Mask settings. I never use a threshold higher than 10, on the other side I sometimes have an amount of 120%-150%.

Hmm, I guess, I know, what to try this weekend.

Kind regards
Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
paulc
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RE: How To Work On Scans?

Fri Sep 07, 2001 5:56 pm

Andy

thanks for your comments - perhaps i should try vuescan software to see if that makes a difference.

I will try your unsharp mask settings also

thanks again

English First, British Second, european Never!
 
AndyEastMids
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RE: How To Work On Scans?

Fri Sep 07, 2001 6:18 pm

Paul,

Some people love VueScan, others hate it...

I'd urge you to give VueScan a try if you aren't having much luck with the Minolta software. I can help you with VueScan settings (at least for slides) if you have any trouble with it. You can download a trial version (which puts hatched grey lines across the scan) for free and see if you can make it work for you - aside from the grid the trial version is fully functional.

Andy
 
gerardo
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RE: How To Work On Scans?

Fri Sep 07, 2001 11:41 pm

About 80% of my scans are done with Vuescan (BTW, I use a Minolta Scan Dual II), the other 20% with the original Minolta software.

Normally Vuescan will get me the better results, but sometimes, the automatic correction in the Minolta software just gives me the better results.

Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment

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