Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

Grainy Pictures

Wed May 01, 2002 10:03 pm

Hey guys,

I am still having problems with my digital pictures.

Because they were not accepted on a.net (what is logical), I uploaded one to planepictures, to show you the problem:

http://www.planepictures.net/netshow.cgi?1020249466:BRU

Imagine you that on that day, there was a completely blueu sky!!!

There was not one cloud!!!

And now I have such a grainy sky, I just don't know how to solve it.

Thanks for your help  Smile

By the way, for if it should help you, I use an Olympus C2100UZ.
Settings for this picture: HQ, 1600x1200 (than resized), sharpness on medium.

Regards,
Frederic
 
Staffan
Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

RE: Grainy Pictures

Wed May 01, 2002 10:13 pm

Regarding the colour of the sky, that's Brussels... It's blue if you look up, but just over the horizon it gets this funny ugly greyish colour.
What settings do you use when you sharpen and save the image?

Staffan
 
Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

RE: Grainy Pictures

Thu May 02, 2002 1:22 am

Hey Staffan,

I just change the gamma, the clearity and the contrast a bit, and sharpen them a bit than.

About the compression, I can't change that. So if I save a picture, I can't change the compression.

Regards and thx,
Frederic
 
Turbotrent
Posts: 146
Joined: Tue Jan 01, 2002 8:43 pm

RE: Grainy Pictures

Thu May 02, 2002 3:28 am

Hey Frederic  Smile

when I looked at your picture I instantly thought about my pictures. They had also a grey sky, although it was a beautifull day with no cloud in sight. I have solved it by using a slower shutter speed. I don't know if thats the problem with your pictures, but it did the trick for me. I hope you can solve it.

Greetings,

Tom
Man's flight through life is sustained by the power of his knowledge.
 
mirage
Posts: 3612
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RE: Grainy Pictures

Thu May 02, 2002 4:02 am

How can you freeze fast moving objects (planes) with slow shutter speeds? or are you panning all of them?

Luis
 
Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

RE: Grainy Pictures

Thu May 02, 2002 4:26 am

Hello guys,

Thx for the comments  Smile

@Turbotrent,
The problem is that, when I lower the shutter speed, I have a big risk that the picture is moved, not sharp.

My camera automatically sets the shutter speed, I will have a look at it next time I go to the airport if I can change it.

Thanks and best regards,
Frederic
 
Jan Mogren
Posts: 2014
Joined: Tue Dec 26, 2000 2:47 am

RE: Grainy Pictures

Thu May 02, 2002 5:21 am

It has NOTHING to do with the shutterspeed.....
/JM
AeroPresentation - Airline DVD's filmed in High Definition
 
Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

RE: Grainy Pictures

Thu May 02, 2002 5:27 am

Hey Jan,

If you know that it is not the shutter speed, do you know what it is than please?

Regards,
Frederic
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: Grainy Pictures

Thu May 02, 2002 5:34 am

It is just the colour of the sky! Haze, Fog, Smog, whatever you want to call it....

Wietse
Wietse de Graaf
 
Staffan
Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

RE: Grainy Pictures

Thu May 02, 2002 5:45 am

Frederic, as I said, it's the pollution and haze in the sky that gives it that colour. Next time there is a blue sky and you are near the airport, look just above the horizon (the part that would be in a photo), and you'll see that it isn't blue, rather grey, brown or whatever... If you want blue sky as a backdrop, go when there has been a strong wind or has rained for a few days, that usually clears it up.

Staffan
 
Vez
Posts: 79
Joined: Thu Nov 15, 2001 12:13 pm

RE: Grainy Pictures

Thu May 02, 2002 7:23 am

Hi,

As for the color of the sky, as someone already mentionned, it is clear when you look up, but not when you look toward the horizon. We can see a lot of atmospheric perspective ( that is, the humidity, pollution and everything) between you and the background (the buildings). That atmospheric perspective, which is gray in a polluted city, is much more deep in the area just above the horizon, because it extends way further, so it gives a grey sky such as this. You have to shoot on a very very very clear day not to see it in a city.

But for the grain, your problem seem to come, in my point of view, from a contrast too high. You lose all the detail in the dark (for example the fan of the engine) and clear (the white part of the plane's fuselage) parts of the picture. You probably had way more detail in these areas on the original picure, straight out of the camera. If not, the camera itself shoots with too much contrast. You could probably set it to a lower value.

(Sometimes, the light of the day gives too much contrast that the dynamic range of the film (or in this case the ccd) cannot fully render. I don't believe though that we can account for such a high contrast only caused by the type of light you had. Usually, days that give such high contrasts don't have as much atmospheric perspective as you have on your picture.)

When you add more contrast to the entire picture (eith an image editing software), it most of the times results in a granier picture, because you increase the contrast between the "grains" and their surroundings, hence you see them more. So my advice would be to try different contrast values. If you have Photoshop, work with the curves in an adjustment layer, so you can always change the settings.

Mart
 
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Bruce
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RE: Grainy Pictures

Thu May 02, 2002 3:32 pm

You know, its not just you guys in Brussels. I am in the united states, NOT in a big city, but in the southeast, and our summer sky is frequently a "milky-white" even though its a nice day. They say that its the pollution from factories up on the Ohio River that follows the air currents for 400-500 miles to the south and east. it tends to be worse in the summer than winter.

It sucks.
Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
 
fuairliner
Posts: 530
Joined: Mon Jul 16, 2001 7:23 pm

RE: Grainy Pictures

Thu May 02, 2002 4:14 pm

Frederic,

just select the sky and apply some blur. If you sharpen areas which tend to look grainy (skys, dark parts) you will increase the grain and make your shot look worse. I select the sky, apply some blur, then invert the selection and sharpen the other parts. I have never had problems with that method.


Jan,

I love your short, precise comments.  Smokin cool  Big thumbs up


Frank
Frank Unterspann - Hamburg, Germany
 
Jan Mogren
Posts: 2014
Joined: Tue Dec 26, 2000 2:47 am

RE: Grainy Pictures

Thu May 02, 2002 7:04 pm

Thanks!  Wink/being sarcastic


/JM
AeroPresentation - Airline DVD's filmed in High Definition
 
Craigy
Posts: 1076
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RE: Grainy Pictures

Thu May 02, 2002 7:33 pm

Does your camera have an ISO setting and if so, what are you using?
Craig.
 
Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

RE: Grainy Pictures

Fri May 03, 2002 12:27 am

Hello guys,

Thanks for all the interesting replies  Smile/happy/getting dizzy

It seems to be the pollution, I thought it had sth to do with the camera ...

@Craigy:
My camera automatically changes all these things, so I don't know which ISO setting he used...

Thanks and best regards,
Frederic
 
EGGD
Posts: 11880
Joined: Sat Feb 24, 2001 12:01 am

RE: Grainy Pictures

Fri May 03, 2002 12:32 am

Frederic - I believe it is the user that changes the ISO settings, not the camera (auto or P mode doesn't change the ISO, at least not on the pro90).
 
LGW
Posts: 4281
Joined: Thu Jun 01, 2000 6:07 pm

RE: Grainy Pictures

Fri May 03, 2002 12:49 am

On the 2100 you can choose AUTO or 100 or 200 or 400 ISO's. If you use auto it will automatically choose which one it thinks is best. If you want a certain one, just choose it!

LGW
 
PUnmuth@VIE
Posts: 3119
Joined: Thu Aug 24, 2000 9:31 pm

RE: Grainy Pictures

Fri May 03, 2002 12:49 am

I know some digicams which adjust the ISO automatically when its too dark.
Peter
-
 
Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

RE: Grainy Pictures

Sat May 04, 2002 4:16 am

Hello guys,

Thanks for all the help and the replies.

Here are some other rejections, again for problems I understand, but I can't solve them.
It is sad to see all your pictures rejected, and if you can't do something on them.

Here are some links:

These are badcompressed:
http://airliners.net/procphotos/rejphoto.main?filename=SQB744c.jpg
http://airliners.net/procphotos/rejphoto.main?filename=SQB744b.jpg

This one is low quality:
http://airliners.net/procphotos/rejphoto.main?filename=BRM11Fa.jpg

I understand the rejection reason for 100%, but I want to solve it.

Who can give me some tips??

Thanks in advantance!!!

@Turbotrent:
Did you receive my mail now? I hope that the problems are solved...

@Peter Unmuth:
Check your mailbox please.

Best regards,
Frederic
 
lewis
Posts: 3578
Joined: Thu Jul 08, 1999 5:41 am

RE: Grainy Pictures

Sat May 04, 2002 7:45 pm

Maybe you should use Unsharp Mask and not sharpen...
 
airhead711
Posts: 243
Joined: Thu Mar 28, 2002 7:38 am

RE: Grainy Pictures

Sun May 05, 2002 8:14 am

Hello,
I am also using the C-2100 from olympus.I'm still a beginner but I do seem to be having some luck with it.I use it on P mode,SHQ and ISO set to auto.If you change the default settings,make sure you turn off the auto reset or they will go back to default as soon as you turn off the camera.As far as enhancing,I use Photomax Pro.I just resample them to size 1040 X xxx.Then go to sharpen tool and click sharpen lightly.Thats all I do.Go to search and look for "Scott Hoggard".All my photos except the F-101 were taken with the C-2100.

Good Luck!
Scott
 
fuairliner
Posts: 530
Joined: Mon Jul 16, 2001 7:23 pm

RE: Grainy Pictures

Sun May 05, 2002 4:44 pm

Frederic,

to avoid a "bad compression" rejection you should save your shots as a .jpg with the highest possible quality. You should get a filesize of about 500-600 Kb.

Your "low quality" rejection is also caused by too much compression, but the slide/negative itself might be a little unsharp. Look at the orange parts of the tail and winglets. I would also crop it a little tighter.


Frank
Frank Unterspann - Hamburg, Germany
 
Sabena 690
Topic Author
Posts: 6065
Joined: Sat Feb 02, 2002 12:48 am

RE: Grainy Pictures

Sun May 05, 2002 5:19 pm

Thanks for helping guys!!!  Smile/happy/getting dizzy

@Airhead711,
You have great pictures!!

@FUAirliner,
I can't change the compression and the quality with the software I have now.

And I can't crop the picture with the software I have now.

I thought that that software was good enough, but apparently not  Sad

I use the software of Olympus.
Does anyone else use this software?

Regards and thanks,
Frederic

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