How to develop an chart in C1 to make a camera profile ?

How to develop a chart picture with C1 to use it with a camera profiling software (Eye-One Match or PM5...) ?

For development software which describe camera with an internal and hiden proprietary "profile" (ACR for instance) the workflow is easy to understand because you only have access to rendered final images...

But for development software (as C1) which use an ICC camera profile, it is a little more tricky. I suppose that we have to use a chart image at an intermediate development level, when no profile is yet applied.

Can anybody can tell me if this workflow is right, for profiling (1-7) and for using the new profile (8-11) :

1 - take a raw picture of the chart (ColorChecker...)
2 - open it in C1
3 - In Color preference, select camera profile : Phase One -No color correction
4 - develop the chart picture and embed this profile in TIFF file
5 - (alternate : develop the chart picture with this camera profile but output it in a standard color space as Adobe RGB)
6 - use this picture in camera profiling software to make the new camera profile
7 - copy this new camera profile in ad hoc system file (Color for Windows XP)
8 - open a new picture in C1
9 - select the new profile as camera profile in Color preference
10 - develop the picture and embed the new camera profile in TIFF file
11 - (alternate : develop the chart picture with this profile but output it in a standard color space as Adobe RGB)

Nicolas221

May 16, 2007 06:16

That's basically the weay to proceed. However, in 4, you just develop the file without a specific profile embedded.

I tried once profiling my camera with an IT.8 target. More for education than anything else. While it worked, the results weren't great. Camera profiling is a difficult task. You typically require to mix different profiles resulting from different shots under different lighting conditions, and use something better than a IT8 target.

Christopher

May 21, 2007 06:14

There's a button in the Capture One tool bar that disables "Color management" (it looks like three over-lapping circles of green, red and blue forming a white area in the center), this will keep any camera profiles from being applied.

White balance should be set correctly for the shot (balance on a white or gray square).

You may also want to try the "Linear response" setting from the Exposure tab to disable Capture One's film curve emulation.

Sharpening and noise reduction should make no difference, but if you wish sharpening could be disabled on the output files, and setting the noise reduction to a high amount may help smooth out any small color differences between pixels (the profiling software should be taking an average anyway).

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