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Banding issue with blue sky
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Jan 7, 2012 16:50:22   #
topdoghawaii Loc: Honolulu, Hawaii
 
This is a picture of Molokai and Maui taken from a lookout on Oahu. I notice banding issue when I post it on Facebook and Flickrs, don't know if it will show up here. The problem is banding show up in the area of the blue sky. Anyone have a good tip on avoiding banding?



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Jan 7, 2012 17:24:58   #
oleg Loc: NYC
 
Banding is a fault of JPG compression. To avoid use uncompressed formats- TIFF, PNG

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Jan 7, 2012 19:00:31   #
topdoghawaii Loc: Honolulu, Hawaii
 
oleg wrote:
Banding is a fault of JPG compression. To avoid use uncompressed formats- TIFF, PNG


Thanks to Oleg for pointing out the compression issue with JPG. But Facebook will convert the image back to Jpg even if upload a PNG file. Flickr does better than Facebook in their conversion but not much. Mahalo Oleg, for your help.

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Jan 8, 2012 07:50:30   #
Erv Loc: Medina Ohio
 
did you have a CP on? Also you might try a real light ND filter, maybe around 1or2.
Erv

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Jan 8, 2012 08:18:11   #
topdoghawaii Loc: Honolulu, Hawaii
 
Erv wrote:
did you have a CP on? Also you might try a real light ND filter, maybe around 1or2.
Erv


the Raw file and Tiff file didn't show any banding issue in Photoshop and Aperture. Only after I save for web as JPG and post them on Facebook the banding in the blue sky area started to show. I learned that Facebook's photo album uploaded conversion is not that good.

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Jan 8, 2012 09:18:41   #
ephraim Imperio
 
topdoghawaii wrote:
This is a picture of Molokai and Maui taken from a lookout on Oahu. I notice banding issue when I post it on Facebook and Flickrs, don't know if it will show up here. The problem is banding show up in the area of the blue sky. Anyone have a good tip on avoiding banding?


What banding? I don't see any banding on my monitor!

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Jan 8, 2012 09:44:56   #
cheineck Loc: Hobe Sound, FL
 
You might try selecting the entire image in PhotoShop and applying gaussian blur at .5 setting. This should eliminate or at least reduce banding.

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Jan 8, 2012 12:18:52   #
PNagy Loc: Missouri City, Texas
 
I downloaded this picture and did not see any banding. it is possible that the UH software blurred your original. If there is banding in the sky here is one fix with Photoshop.

1. Go to filter > blur > gaussian blur.

2. set the radius slider to 11. If this is too much, reduce it until the color variation in the sky remains, but the banding is banished.

3. go to the history panel. Make the original state active, the one before your blurring. This is checked in the elongated rectangular.

4. Now, in the gaussian blur click the small square box to the left. You will see the symbol for the history brush emerge in the box.

5. select the history brush. Set it for the right size, with maximal feathering. Paint over the areas that show banding.

You are done. The banding is gone and the sharpness of the remainder of the picture remains.

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Jan 8, 2012 12:25:51   #
drobbia Loc: Near Middletown, CA
 
I learn something everytime i come to this forum -- THANKS
oleg wrote:
Banding is a fault of JPG compression. To avoid use uncompressed formats- TIFF, PNG

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Jan 8, 2012 15:43:32   #
pfredd
 
The only " banding " I see here is in lower third of sky. What I see is not from compression —— it is layers in the atmosphere. You may see something that is not coming to this site. Oh, it is not from a polarizing filter, but sometimes natural polarization in the atmosphere can appear.

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Jan 8, 2012 17:11:06   #
topdoghawaii Loc: Honolulu, Hawaii
 
Mahalo everybody. Thanks to PNagy for your tips on eliminating banding in Photoshop. Finally, I traced the problem to Facebook's jpg compression. It appear Flickr is a little better. A friend of mine suggested Smugmug for photo gallery. Again, thanks everybody for your tips and suggestions. Mahalo!

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Jan 9, 2012 04:59:49   #
marcomarks Loc: Ft. Myers, FL
 
cheineck wrote:
You might try selecting the entire image in PhotoShop and applying gaussian blur at .5 setting. This should eliminate or at least reduce banding.


Yuck...

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Jan 16, 2012 15:14:39   #
English_Wolf Loc: Near Pensacola, FL
 
Late in the game and possibly not a good workaround but need to be experimented with...

Thy saving as interlaced JPG. This will change the logarithm when FB or flicker re-sizes the image.

Just a silly thought.

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Jan 16, 2012 15:40:36   #
topdoghawaii Loc: Honolulu, Hawaii
 
English_Wolf wrote:
Late in the game and possibly not a good workaround but need to be experimented with...

Thy saving as interlaced JPG. This will change the logarithm when FB or flicker re-sizes the image.

Just a silly thought.


Mahalo English_Wolf, I didn't think of that, will give it a try. Thanks for the tips.

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Jan 16, 2012 15:46:19   #
loyalpentaxfan Loc: South Carolina
 
Old-school observation here -- the darker blue at the top is probably not a flaw, but part of the polarized band, which naturally occurs at about 90-degrees from the sun.
You can only capture this with a clear-blue sky and a very wide lens, both of which you have here.
It can be very difficult to see with the naked eye, but you can locate it easily; make an "L" with your thumb and index finger, point at the sum, and wherever your thumb can point, the sky will photograph bluer (and polarizing lenses will become more effective!)

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