gerardo
Posts: 3372
Joined: Sun May 21, 2000 6:22 pm

Scan And Photo Tips

Sat Nov 25, 2000 5:22 am

Dear all

I know, there have been many questions like this. I have also browsed thru many topics, but somehow nothing I saw there seems to work for my problem.

What can I do to resolve that pixelation problem - above all on the background - on the next picture:


(Picture copyright by http://fly.to/zrh

If the picture doesn't show up, click on the next URL:
http://www.dplanet.ch/users/dominguez/Pics-old/photos/BC/B763_DL_A.jpg

The photo (print) looks pretty good to me. I use a Umax 1220S on a Mac with Photoshop. I scanned it with 400dpi, used the unsharp mask feature, adjusted a little bit the colours and changed the resolution to 800X600 at 96dpi.

Any help appreciated

Regards
Gerardo
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
 
Davus
Posts: 145
Joined: Sat Oct 21, 2000 9:31 am

RE: Scan And Photo Tips

Tue Nov 28, 2000 9:07 am

Hi,

The shot looks very nice to me. If anything you can see pixellation round the word 'delta'. Try to keep the image at the original DPI and just resample the size. Might not work but then again it might.

A very good shot in my opinion.

Regards

Dave
MEL, Australia
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Scan And Photo Tips

Tue Nov 28, 2000 6:05 pm

In my opinion it looks oversharpened - note jaggy cheatline and, I think, unnatural levels of contrast in bare metal areas. Also I think large copyright notices may work against you getting accepted - the system adds one on the bottom of each pic anyway.

Cheers,

Colin
Colin K. Work, Pixstel
 
USAir_757
Posts: 949
Joined: Wed Jun 14, 2000 12:30 am

RE: Scan And Photo Tips

Tue Nov 28, 2000 10:20 pm

To solve your pixellation problem - ease off bigtime on the sharpen.

Before resampling from 400DPI, run the unsharp mask at radius 1, amount 100, threshhold 10(NOT 0). Then resample, and sharpen once or twice(depending on your software, as different software has different sharpen intensities). That should prove for the best results. Also MAKE SURE that the scanner does NO sharpening during the scan. As for the contrast - I think that looks more like when you're actually standing there viewing the aircraft, and looks good the way it is.

Cheers,
C. Wassell
-Cullen Wassell @ MLI | Pentax K5 + DA18-55WR + Sigma 70-300 DL Macro Super
 
TomH
Posts: 950
Joined: Thu May 27, 1999 4:13 am

RE: Scan And Photo Tips

Fri Dec 01, 2000 3:47 am

Gerardo,
I also think you sharpened the image too much. Aside from the jaggies on the red cheatline, another clue is the lightened area in the sky just aft of the rudder on the vertical stabilizer. The blue sky looks a bit grainy also, which can happen if you sharpen excessively. Perform your image editing and as the last step after cropping, resizing and all other activities, sharpen the image just a little.
You may have a similar problem when working on images of executive aircraft. Many of these have several horizontal lines running back down the fuselage from the nose of the aircraft. When they are near horizontal in the monitor, they develop real bad jaggies. This particular problem is troubling me greatly, and unfortunately the advice I get from other photographers is that there is little I can do about it.
 
gerardo
Posts: 3372
Joined: Sun May 21, 2000 6:22 pm

RE: Scan And Photo Tips

Fri Dec 01, 2000 6:17 am

Thanks a lot. I did some homeworks, also with your input, and the result can be seen at the following URL:
http://g_dominguez.tripod.com/Pics/photos/BC/B763_DL_A.jpg

Mainly I didn't sharpen as much as I did earlier. What was most disturbing for me, was the grainy background, which I described as "pixelation" (sorry, but English isn't my first language ).

As for the large copyright banner: Thanks for this input. Should I decide to upload some pictures, I will remove this part. The picture is directly from my own homepage.

Once again, thank you very much

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

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