Histogram issue and overexposition wrong reading / output

NN187458UL2

• May 21, 2011 14:09

Hello,

I just noticed something strange in C1 behaviour about overexposed images.

I don't really know how to describe this by words, so I'm going to show it.

I have this image (which is one of a serie, the behaviour is always the same), here it is how it look in C1 and the relative histogram's reading:
http://dl.dropbox.com/u/29939358/c1issue/c12_s.jpg
I pointed the picker over the overexposed area and it gives back 239 238 239 238 values.

Exporting the image and opening it in photoshop, painting with white on the area, you can see that the white is different than the color which is under:
http://dl.dropbox.com/u/29939358/c1issue/ps_s.jpg

Opening the same raw in acr
http://dl.dropbox.com/u/29939358/c1issue/acr_s.jpg

and in aperture
http://dl.dropbox.com/u/29939358/c1issue/aperture_s.jpg

pointing on the same area, values are 255 255 255.


The images are raws (.ARW) from a sony alpha 900.

Does anybody have an idea about that?

Thank you, regards.

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  Paul Steunebrink

  • May 21, 2011 14:25

  I did not get to see the images; perhaps you placed them in the private instead of public section of your Dropbox. Or it is me or my browser (but I clicked on one image and was requested to logon).
  
  Edit: adding "... not ..."

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  Keith Reeder

  • May 21, 2011 20:46

  Can't see the images either, but something like this - Cap One not reporting back correct RGB values for whites - has been reported before.

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  NN187458UL2

  • May 22, 2011 14:26

  I'm sorry, I'm a newbie about dropbox. 😁
  
  Now everything should work.
  
  I'm going to check also the other thread linked.

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  NN187458UL2

  • May 22, 2011 14:33

  [quote="Keith Reeder" wrote:
  Can't see the images either, but something like this - Cap One not reporting back correct RGB values for whites - has been reported before.

  
  
  
  I read the thread.
  It was about C1 v5 and windows.
  
  Should I report the case to the support team, since the problem seems to persist in versione 6.x and on mac?
  
  Also, I tried to make a photo of a white wall, overexposing intentionally: C1 says 255 255 255.
  But there are still some hundreds images that I shoot lately, with intentional pure white bg, which have uncorrect white values.

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  Paul Steunebrink

  • May 22, 2011 14:38

  I think reporting to Phase One support seems like a wise decision.

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  Keith Reeder

  • May 23, 2011 18:22

  [quote="NN187458UL2" wrote:
  I read the thread.
  It was about C1 v5 and windows.

  
  But it's still the same problem.
  
  Raise a support case.

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