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How To Work On Scans?  
User currently offlineRWY-16 From Switzerland, joined Dec 2000, 106 posts, RR: 3
Posted (13 years 3 months 3 weeks 9 hours ago) and read 2832 times:

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

20 replies: All unread, jump to last
 
User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 3 months 3 weeks 9 hours ago) and read 2784 times:

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


User currently offlineRWY-16 From Switzerland, joined Dec 2000, 106 posts, RR: 3
Reply 2, posted (13 years 3 months 3 weeks 8 hours ago) and read 2760 times:

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


User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 3 months 3 weeks 8 hours ago) and read 2759 times:

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


User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 4, posted (13 years 3 months 3 weeks 8 hours ago) and read 2747 times:

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
User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 5, posted (13 years 3 months 2 weeks 6 days 6 hours ago) and read 2722 times:

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
User currently offlineOO-VEG From Netherlands, joined Oct 2000, 1125 posts, RR: 1
Reply 6, posted (13 years 3 months 2 weeks 6 days 5 hours ago) and read 2713 times:

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?


User currently offlineAviationIvi From Germany, joined Feb 2001, 777 posts, RR: 7
Reply 7, posted (13 years 3 months 2 weeks 6 days 5 hours ago) and read 2707 times:

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


User currently offlineMartin21 From Netherlands, joined Aug 2001, 347 posts, RR: 1
Reply 8, posted (13 years 3 months 2 weeks 6 days ago) and read 2689 times:

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 !
User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 9, posted (13 years 3 months 2 weeks 5 days 21 hours ago) and read 2672 times:

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
User currently offlinePaulc From United Kingdom, joined Mar 2001, 1490 posts, RR: 0
Reply 10, posted (13 years 3 months 2 weeks 1 day 10 hours ago) and read 2636 times:

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!
User currently offlineJwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 11, posted (13 years 3 months 2 weeks 1 day 10 hours ago) and read 2636 times:

Minolta software will output 8 or 16 bit, never 12.


I wish I were flying
User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 12, posted (13 years 3 months 2 weeks 1 day 5 hours ago) and read 2628 times:

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
User currently offlineAndyEastMids From United Kingdom, joined Jan 2001, 1025 posts, RR: 2
Reply 13, posted (13 years 3 months 2 weeks 1 day 5 hours ago) and read 2623 times:

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


User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 14, posted (13 years 3 months 2 weeks 1 day 1 hour ago) and read 2630 times:

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
User currently offlineAndyEastMids From United Kingdom, joined Jan 2001, 1025 posts, RR: 2
Reply 15, posted (13 years 3 months 2 weeks 1 day 1 hour ago) and read 2609 times:

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!


User currently offlineAndyEastMids From United Kingdom, joined Jan 2001, 1025 posts, RR: 2
Reply 16, posted (13 years 3 months 2 weeks 20 hours ago) and read 2597 times:

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


User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 17, posted (13 years 3 months 2 weeks 10 hours ago) and read 2585 times:

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
User currently offlinePaulc From United Kingdom, joined Mar 2001, 1490 posts, RR: 0
Reply 18, posted (13 years 3 months 2 weeks 8 hours ago) and read 2580 times:

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!
User currently offlineAndyEastMids From United Kingdom, joined Jan 2001, 1025 posts, RR: 2
Reply 19, posted (13 years 3 months 2 weeks 8 hours ago) and read 2578 times:

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


User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 30
Reply 20, posted (13 years 3 months 2 weeks 3 hours ago) and read 2570 times:

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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