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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 11 Jan 2013 (Friday) 23:09
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why are my RAW files red but JPEGs not?!

 
jpbimages
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Jan 11, 2013 23:09 |  #1

I did a photoshoot tonight and as I was flipping through the photos on my computer I noticed my RAW files are turning out much more red than my JPEGs. Does anyone know why this would be?
I didn't change my white balance or anything, I just realized part way through that I hadn't set it back to RAW (I was shooting some stuff for my dad for ebay before, which I don't do RAWs).

I'll post pics later if folks need
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mike_d
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Jan 11, 2013 23:59 |  #2

Customized picture style or WB shift maybe? Custom preset on your raw converter?




  
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jpbimages
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Jan 12, 2013 00:42 |  #3

I'm just viewing them in windows photo viewer
The thumbnail looks right but the RAW is red




  
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PixelMagic
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Jan 12, 2013 03:06 |  #4

What codec are you using to generate and display the raw thumbnails in Windows Photo Viewer?

My guess is that the codec is not interpreting the WB setting correctly. Contrary to what most people believe, White Balance is not a precise (exact number of degrees color temperature) setting. Rather, it is simply a metadata "flag" generated by the camera and written to the EXIF metadata. My guess is that the codec is either ignoring or misreading the flag.

With JPEGS its different since the White Balance is directly "baked into" the file.


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tzalman
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Jan 12, 2013 04:23 |  #5

PixelMagic wrote in post #15478036 (external link)
What codec are you using to generate and display the raw thumbnails in Windows Photo Viewer?

My guess is that the codec is not interpreting the WB setting correctly. Contrary to what most people believe, White Balance is not a precise (exact number of degrees color temperature) setting. Rather, it is simply a metadata "flag" generated by the camera and written to the EXIF metadata. My guess is that the codec is either ignoring or misreading the flag.

With JPEGS its different since the White Balance is directly "baked into" the file.

Windows Photo Viewer does not "generate" either thumbnails or full screen displays. It has no Raw conversion abilities, to generate even the tiniest thumbnail would require the entire basic panoply of conversion processing; demosaicing, gamma correction, camera profile application plus color space conversion, WB application, etc. All the codec does is to enable WPV and Explorer to find and display the embedded jpg, which should be identical to any other jpg made by the camera, unless the camera settings are changed. Therefore, the OP's observation that the embedded jpgs are different from exported standalone jpgs sounds more like a camera glitz or user error (that the light environment changed or some camera settings were in fact changed and the change was either accidental or forgotten.)


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jpbimages
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Jan 12, 2013 11:51 |  #6

I'll post photos soon
I know I didn't change lighting (two light stands and flashes were used)
I originally thought it may be user error, but now under un-changing light and settings i know it had to be something else.




  
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René ­ Damkot
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Jan 12, 2013 17:32 |  #7

It might be a color management issue?


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PUREBRAD
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Jan 12, 2013 22:04 as a reply to  @ René Damkot's post |  #8

I have the same issue with my two current computers, my sister-in-laws present computer and a computer I had previously. When I open an image folder in Windows (currently using Win7x64) the thumbnails look fine to me. When I double-click the thumbnail to open the image in the photo viewer, they look TERRIBLE! All of the images have a greenish-yellow cast to them, and lack any detail. Oddly though, if I click the button to start a slideshow, the images render correctly when the slideshow is playing. This has been bothering me for years. My previous desktop (Win Vista) did the same thing.

I just can't seem to crack this one, and typically avoid using windows to view images, even though sometimes it is just more convenient than simply opening DPP to view images. Note: Images appear correctly in DPP.


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tonylong
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Jan 12, 2013 23:35 |  #9

The best way of getting informed input on this would to upload both an example jpeg and a Raw file for us to download and analyze. I recomment the YouSendIt.com site for a hassle-free way of uploading one file at a time.


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why are my RAW files red but JPEGs not?!
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