ICC workflows

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ICC workflows

Postby NN635526263967659041UL » Fri Nov 18, 2016 5:44 pm

Hi there

Does anyone have any advice on housekeeping ICC profiles when profiling for C1? I don't know if or when I should be deleting profiles. I find I have to create a new profile every time I shoot. To me it seems a much more logical solution to have the profile embedded in a dng.

Advice welcome.
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Re: ICC workflows

Postby Ian3 » Fri Nov 18, 2016 7:23 pm

Why do you have to create a profile? Doesn't C1 use the right ICC profile for your camera automatically? What camera are you using and is it supported by C1?

Ian
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Re: ICC workflows

Postby NN635526263967659041UL » Sat Nov 19, 2016 5:16 am

Hi Ian

It does a great job out of camera, but I can assure you that fine art repro demands a few extra steps. I use a Minolta colour meter to get a ballpark wb, and also a colorchecker passport with basiccolor input for what I call the colour 'signature'. In this instance it was for a Sony A7R / Canon TSE 24 setup under Elinchroms.

Seriously, there is a perceptible difference in the before/after shots.
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Re: ICC workflows

Postby Ian3 » Sat Nov 19, 2016 10:36 am

OK - so now it's clearer what you are trying to do. Hopefully someone with some experience of this kind of requirement will be able to comment.

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Re: ICC workflows

Postby Grant Kernan » Mon Nov 21, 2016 10:15 am

All I do is Fine Art Repro Mac 0SX10.10.5 and C09.3, and I assure you the profiles supplied by CO for the D800 series will not give accurate colour and tones.
What I do is first embed their Generic ICC Profile to get me started. I later discard it in PS! I shoot a Colour checker SG which has more patches than the passport. I shoot tethered and I use CO to help set the exposure and white balance... White chip to 243 RGB units white balancing in CO from the grey patches. Then I shoot a white card which I use to apply the LCC to both the art and the SG Colour Checker.
Next I make a colour profile in Pictocolor's "IN CAMERA" software.
Then I go back to CO where I choose my new ICC Profile - Other - My Profile.
All my new captures can make use of my profile as long as I keep the white exposure to 243 RGB and choose the profile. For speed I can copy all my adjustments including curves and profiles as an adjustment and then apply it to successive shots. This way I can make use of CO LCC , level and crop tools as well as the output recipe's including their excellent Interpolation up to 250%.
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Re: ICC workflows

Postby NN635526263967659041UL » Thu Nov 24, 2016 5:19 am

Thanks Grant. And I thought I was being thorough...! I must look into your workflow.
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Re: ICC workflows

Postby NN635526263967659041UL » Fri Nov 25, 2016 12:11 am

May I ask, what is the significance of 243 rgb?
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Re: ICC workflows

Postby Grant Kernan » Sat Nov 26, 2016 8:52 pm

I started using 255, but the image is clipped. "In Camera" needs more head room to retain highlights. My Betterlight scanning training uses 243 RGB as a start value for setting exposure and I have adopted a similar workflow in CO. It is strange, but if you use CO's Generic curves and set the exposure to 243 and then embed the profile at output, the eyedropper in PS will measure 243 but the highlights seem overexposed. When I use my homemade ICC profile delicate highlights magically appear as do shadows. The In Camera profiles even address the problem with cross polarization...It tames contrast. This process can lead to a minor flattening of the image, but at least non of the detail is missing. I can use to use Edit Lab to edit the profile to increase saturation and contrast in the ICC profile, but I have backed away from this process as inkjet Giclee prints can get too saturated and contrasty when they are coated.
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Re: ICC workflows

Postby Martin611 » Thu Apr 13, 2017 3:21 pm

Hello,
I hope it's ok to ask a question here or do I need to start a new thread?
I am doing Copy Art for clients. Do you use dual polarized lighting on all your work or just
the art that requires it.
2. I have not used the white card technique yet and need to learn the steps.
I have bought a sg card and in camera software but still my exposure of the image is off.
I am on mac system,
So many questions so much to learn.
Thanks
Martin
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Re: ICC workflows

Postby Martin611 » Thu Apr 20, 2017 10:03 pm

HI,
Ive working in CO trying to learn and apply LCC. Ive captured my sg card at the distance of my art piece size
captured a white piece of paper the same size as the art piece and finally the art piece.
Now I click on the white paper to create my LCC and I get a warning: lens cast calibration contains clipping data.

I get this is from the white paper that RGB reads higher then 250 but not higher than 255. my white chip on my SG card read 244. So I shot all of the pieces at the same exposure and did not move the camera. So I created the LCC any way to see what would happen and applied it the other 2 images SG card and image. I then processed the SC card image as a tiff and into incamera and created the icc profile. I them applied the new profile in CO to the image and it was gray and cyan looking. Just not good at all. So don't know were to go from here. So help would be greatly appreciated.

Thanks
Martin
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