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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 31 Oct 2011 (Monday) 19:32
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Fixing white balance in JPEG..

 
SimplyEuphoric
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Oct 31, 2011 19:32 |  #1

I didn't shoot this photo in RAW, and I should have. The white balance is far too warm, and fixing it has been a headache. I love the picture and would love to be able to salvage it!

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I think my puppy looks good, but see the pixel-y stool legs in the background? Any suggestions on how to fix this? I'm using GIMP.

Amidst a conversation about her past as an established equestrian, we drove by a wonderful barn filled with horses. I watched as she swiftly unrolled her window and took a deep breath through her nose, letting the sweet aroma fill her lungs. A true horsewoman, I thought. EOS Rebel T3

  
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TooManyHobbies
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Oct 31, 2011 19:34 |  #2

I use photoshop but maybe its close the easiest way is to use a cool (blue) photo filter.


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Palladium
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Oct 31, 2011 19:45 as a reply to  @ TooManyHobbies's post |  #3

touched it up a little - it's difficult without knowing what the actual scene looked like and working with such a small sample is not really going to produce a greats result


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dubstylz
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Oct 31, 2011 19:55 |  #4

This was the best i came up with...

IMAGE: http://farm7.static.flickr.com/6218/6300852672_0a38ee530d_b.jpg
IMAGE LINK: http://www.flickr.com …/69176065@N04/6​300852672/  (external link)
klhuyt (external link) by dubstylzh20-2 (external link), on Flickr

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SimplyEuphoric
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Oct 31, 2011 20:05 |  #5

Thanks guys with the help! So far Dubs looks the most realistic. In GIMP, I was just playing around with the color balance and saturation, how did you get this result?


Amidst a conversation about her past as an established equestrian, we drove by a wonderful barn filled with horses. I watched as she swiftly unrolled her window and took a deep breath through her nose, letting the sweet aroma fill her lungs. A true horsewoman, I thought. EOS Rebel T3

  
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dubstylz
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Oct 31, 2011 20:13 |  #6

Thats exactly how i did too just dropped the colour temp down pretty much as far as i could, dropped saturation down a bit, then i just touched the levels a little as the highlights started to blow as the colour changed.

Lovely looking pooch btw :)


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SimplyEuphoric
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Oct 31, 2011 20:53 |  #7

Thank you! I'll have to play around and see if I can get the same result! I'm such a noob!!:D


Amidst a conversation about her past as an established equestrian, we drove by a wonderful barn filled with horses. I watched as she swiftly unrolled her window and took a deep breath through her nose, letting the sweet aroma fill her lungs. A true horsewoman, I thought. EOS Rebel T3

  
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SimplyEuphoric
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Oct 31, 2011 21:06 |  #8

Thank you! I'll have to play around and see if I can get the same result! I'm such a noob!!:D


Amidst a conversation about her past as an established equestrian, we drove by a wonderful barn filled with horses. I watched as she swiftly unrolled her window and took a deep breath through her nose, letting the sweet aroma fill her lungs. A true horsewoman, I thought. EOS Rebel T3

  
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kirkt
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Oct 31, 2011 21:22 |  #9

Here is an approach using a curve adjustment that mimics the process used in white balancing raw files (scaling the exposure of the R, G and B channels). You make straight-line adjustments to the R, G and B curves either by dragging the white point (the endpoint of the curve on the white end) to the left to increase the channel's scaling or downward to decrease the scaling. You need to find a reasonable neutral in your image and then see how the pixels in that neutral patch are represented in the R, G and B channels - if the patch is neutral, the pixels in the R, G and B channels should all have similar values and the histogram should show that the peaks in the R, G and B channels are aligned with one another. If they are not then you use the curve adjustment to get them in line. See screenshots.

Love the shot, btw.

kirk

Here is the neutral patch (blaze on your pup's chest) selected and the histogram of those pixels - if the blaze is whitish, the peaks should all be aligned, but obviously they are not!

IMAGE: http://kirkt.smugmug.com/Photography/Photo-of-the-Day/i-6FTDCCn/0/X2/dogwhiteref-X2.jpg

So, we make some curves adjustments - here I reduced the scaling on the R channel and increased it on the B channel to bring the three peaks into alignment. Here is what the curves look like:

IMAGE: http://kirkt.smugmug.com/Photography/Photo-of-the-Day/i-Dn6GgZr/0/X2/dogwbcurves-X2.jpg

and here's what the histogram of the patch on the blaze looks like after the adjustment:

IMAGE: http://kirkt.smugmug.com/Photography/Photo-of-the-Day/i-7mSfwSn/0/X2/dogwbpatchadjusted-X2.jpg

Here is the balanced image (I went toward red), with some additional tweaking of contrast. - you may decide that you want more warmth, etc., which you can do by making tweaks to the curve white point away from neutral.

IMAGE: http://kirkt.smugmug.com/Photography/Photo-of-the-Day/i-7MhQWHV/0/X3/dog-X3.jpg

Notice that I brought the reds down and the blues up to meet the green channel - this keeps the top of the head from blowing. What is apparent when you balance for the overwhelming tungsten cast is that there is daylight coming from a window illuminating some of the subject - the more obvious areas appear as a bluish cast (dog's nose highlight). Trying to balance for mixed lighting is a little bit more difficult, but you can just do the same thing on another curves layer and paint in the daylight-balanced curve adjustment in the spots where you get an intensified bluish cast from the first balancing curve.

Kirk
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digital ­ paradise
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Nov 01, 2011 07:28 |  #10

Palladium wrote in post #13334847 (external link)
touched it up a little - it's difficult without knowing what the actual scene looked like and working with such a small sample is not really going to produce a greats result

Can you describe how you did this? Thanks


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cfcRebel
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Nov 01, 2011 11:58 |  #11

I find Eddie Tapp's "90% method" works well for correcting jpeg WB.
http://www.eddietapp.c​om/PDFs/90percent.pdf (external link)


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SimplyEuphoric
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Nov 01, 2011 12:18 |  #12

Thanks for all your help everyone!

I love the tutorial Kirk, I appreciate the fact that you put so much time into your post, I've been playing around with it myself and have learned a lot!


Amidst a conversation about her past as an established equestrian, we drove by a wonderful barn filled with horses. I watched as she swiftly unrolled her window and took a deep breath through her nose, letting the sweet aroma fill her lungs. A true horsewoman, I thought. EOS Rebel T3

  
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kirkt
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Nov 01, 2011 12:55 |  #13

No problem. I haven't used GIMP in a while, so I do not know if it supports 16bit image editing. If it does, there are a couple of things you can do prior to making these adjustments that will help preserve the JPEG image data.

1) Upon opening the image, convert it from 8 to 16 bit.
2) Convert the image to a linear color profile for editing - this way the straight line curves adjustments will be linear exposure adjustments (operating on an image with gamma = 1).

These are extra bonus tips that are not necessary but are helpful, especially when making large adjustments that tend to break down the 8bit histogram (as in the blue channel in my example).

have fun!

kirk


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digital ­ paradise
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Nov 01, 2011 13:12 |  #14

cfcRebel wrote in post #13337599 (external link)
I find Eddie Tapp's "90% method" works well for correcting jpeg WB.
http://www.eddietapp.c​om/PDFs/90percent.pdf (external link)

I was looking at this and just decided to hit auto in levels and got this.

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The in the colour balance pallet I pulled back the Cyan back 32%.

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cfcRebel
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Nov 01, 2011 15:04 |  #15

digital paradise wrote in post #13337932 (external link)
I was looking at this and just decided to hit auto in levels and got this.

The in the colour balance pallet I pulled back the Cyan back 32%.

It seems the Auto isn't bad at all. But i still like the one you manually corrected. Well done!


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Fixing white balance in JPEG..
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