Author Topic: This Is Not A Request For A Critique, But.... (Read 3896 times)

Cricket · « **on:** January 08, 2013, 16:16 »

Hi All

This is not a request for a critique, but I do need some help understanding how to fix a pesky problem with fringe.

Take a look at this photo. It's too bad Flickr will not allow you to download the full resolution because it is easier to see the problem. However, I have also attached 2 thumbnails of the issue, which might be of help.

http://www.flickr.com/photos/92003931@N02/8361591455/#sizes/k/in/photostream/

Anyway... when I am looking at this photo at its full resolution (not stupid flickrs), I am see purple fringing in the pine trees to the left and also fringing in the broad leafed tree that is off to the right.

Usually fringe can easily be removed by making selections and desaturating the offending color... or by creating a layer and using the gaussian blur tool... but neither technique seems to work too well, when there's a deep blue sky and the fringe is almost the same color as the sky.

Also trying to select foliage on a fir tree or a regular tree is a royal pain in the butt... so is there some other easier technique one can use??

And is there some way to avoid this problem in the future?

I'd be most appreciative for any answers you may have.

Thanks,

Cricket

jm · « **Reply #1 on:** January 08, 2013, 16:34 »

Quote from: Cricket on January 08, 2013, 16:16

Usually fringe can easily be removed by making selections and desaturating the offending color... or by creating a layer and using the gaussian blur tool... but neither technique seems to work too well, when there's a deep blue sky and the fringe is almost the same color as the sky.

I know about easier way. Open RAW file in Adobe Camera Raw. Tick "Remove Chromatic Aberation" Box. Done.

Cricket · « **Reply #2 on:** January 08, 2013, 16:42 »

I shot this in .jpg format only. So Is there some other technique I can use?

Cricket

jm · « **Reply #3 on:** January 08, 2013, 16:47 »

Quote from: Cricket on January 08, 2013, 16:42

I shot this in .jpg format only. So Is there some other technique I can use?

Cricket

You can try "Filter" > "Lens Correction" and try to move with sliders - if it's available in your version of Photoshop. It works but it'not always perfect - in RAW it usually is.

Cricket · « **Reply #4 on:** January 08, 2013, 16:53 »

Well darn again..

I am using Paint Shop Pro... not Photoshop. Any other ideas, guys?

Cricket

shotupdave · « **Reply #5 on:** January 08, 2013, 16:57 »

Quote from: Cricket on January 08, 2013, 16:53

Well darn again..

I am using Paint Shop Pro... not Photoshop. Any other ideas, guys?

Cricket

Try GIMP, its free

Cricket · « **Reply #6 on:** January 08, 2013, 17:04 »

Shotupdave,

Does Gimp have a chromatic aberation tool?

Cricket

Jo Ann Snover · « **Reply #7 on:** January 08, 2013, 17:21 »

The manual way to do this requires being able to make a layer and set the blend mode to color - can Paint Shop Pro do that?

You have two choices to make the layer

1. duplicate the image layer and blur it enough to soften the edges. Add a mask to hide the whole layer. Change the layer blend mode to color. On the mask, paint in white over the fringe areas

2. make a blank layer & change blend mode to color. Paint on the layer with a soft edge brush set to the color the fringe should be - probably part blue and part green in the case of branches against the sky. Another way to "paint" is to use the blur tool with its mode set to sample from all layers (apologies if this doesn't work in Paint Shop Pro as I only know Photoshop). Run the blur brush over the fringe edges on the blank layer and you'll see the fringe disappear

ClaridgeJ · « **Reply #8 on:** January 08, 2013, 17:26 »

Yes JoAnns way is correct but its a lot easier for you to shoot in Raw from now on, most converters do have the CA tool. Alternativly use Jo Anns recommendations.

Cricket · « **Reply #9 on:** January 08, 2013, 18:05 »

Hi Guys

Thanks for all your replies, I sincerely appreciate your help!!

I did find that paintshop pro has a chromatic aberation tool. I played around with that and here are my results. Compare these thumbnails to my earlier ones, and see what you think.

I think these results are better... and while I could probably use the chromatic aberation tool on those aqua funky looking blue sections of the pine tree branches... that color (which was changed from purple) is soooo close to matching the sky now... that I think I would risk washing the sky out or bits of it anyway, if I did make such an attempt.

And as for Joann --- Yes... paint shop pro does have masks, layers and various blends including color.

It also has a "change to target" brush which will allow you to match any hue while preserving the texture/detail... unlike the paint brush tool.

Anywho... I'll give your method a try and see how that works for me. Hopefully it will work well.

It's always good to pick up a few extra techniques when the other methods (that usually work in most cases) fail.

Cricket

Poncke · « **Reply #10 on:** January 08, 2013, 18:18 »

I think removed CA in LR works on JPG as well, its not limited to RAW.

The result you posted looks fine as far as I can tell (in terms of CA)

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