C1 versus ACR: a principal question

Juerg1

• February 20, 2014 08:11

Today, after years of working with C1 I read an article about Photoshops' ACR Raw converter and was comparing this to C1. In ACR before actually making the conversion from a RAW file to e.g. a TIFF file you can choose the target color space first and then making any adjustments (e.g. exposure, WB, etc.). And the original settings before the actual conversion is made change quite a bit depending which color space is chosen (e.g. the histogram shows up differently by individual color spaces within the RAW converter before the conversion is actually made).
Within C1 this obviously is not possible. The color space can only be chosen by making the actual conversion after the changes in the settings (e.g. exposure, WB etc.) were done.
Do I miss something here?
My workflow in terms of color spaces is that I shoot in RAW with Adobe RGB in camera setting (although this is obviously not relevant since RAW), open the RAW file in C1, making adjustments and then output a 16 bit TIFF file at 100% in LStar color space. So I admit being a bit confused if this ACR preselection of color space is relevant or not? Hoping to make clear what I mean...
Thanks for enlightments.
Juerg

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  Paul Steunebrink

  • February 20, 2014 10:54

  Hi,
  
  No need to be confused. I do not know the article, and whether or not the author was confused or not, but it does not matter.
  
  Both ACR and CO7 are full color managed applications, both with respect to output and with respect to presentation on screen. The color space on output is fully taken into account with CO7 while adjusting in the preview and made effective in the output file on processing.
  
  You can test this easily for yourself in several ways. One is that you use the Color Readout feature (cursor tool), place it in the image and alternate output profiles. Second test (we starting having fun, haven't we?) is that you look at the Histogram tool while changing output profiles. Same for clipping (exposure warning).
  
  You can alter output profiles from the output recipe or the Proof Profile option in the Edit menu.
  
  Hope you are less confused now.
  
  (and yes, your camera workspace profile setting is not relevant for raw shooting, only for in-camera JPEG)

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  Permanently deleted user

  • February 20, 2014 20:10

  I would add that it is easy to verify also with color readout, it is enough to fall over of a preset of exit has an other one and to see the data modifying according to the space of exit (rvb or cmjn). C1 is really the excellent software for the colorimetry. 😉

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  Paul Steunebrink

  • February 21, 2014 09:59

  [quote="AAlain" wrote:
  ... space of exit (rvb or cmjn) ...

  
  As a translation service to my peers, rvb is French for RGB and cmjn for CMYK. 😉

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  Permanently deleted user

  • February 21, 2014 12:41

  Completely exact! Ha! These French people and the foreign languages. 😉

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