Red Tone Reproduction Curve

Started by gverhoev, July 12, 2016, 07:02:59 PM

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gverhoev

July 12, 2016, 07:02:59 PM
Hi all,

I am unsuccessful in extracting the Red/Green/Blue Tone Reproduction Curves from the colour profile of an image file. I don't know what I do wrong. Using something like:
exiftool.exe -b -GreenTRC Apple_RGB.jpg > curve.txt does not provide me any numbers that represent this curve.

Could somebody point me out my mistake? Cheers,

Geert

Phil Harvey

#1
July 12, 2016, 09:36:21 PM
Hi Geert,

The output from your command is the binary data for the green tone curve.  You would have to read the ICC specification to see how to interpret this data.

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

gverhoev

#2
July 13, 2016, 06:05:03 AM
OK Phil, so you are saying my code is correct and I should not expect to see any numbers that represent these curves? Will check this further. Many thanks.

Phil Harvey

#3
July 13, 2016, 08:24:18 AM
Yup
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux/PowerShell, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).
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