[argyllcms] What are the RGB_R RGB_G RGB_B columns in a ti3 file?
- From: prathana shrestha <prarthana_shrestha@xxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Tue, 27 Sep 2011 16:47:19 +0000
Could you please explain, what are the RGB_R RGB_G RGB_B values in the ti3 file
? Are they observed raw RGB values, normalized RGB by 100 or 255, non-linear
RGB (if so what is the gamma)? I am having difficulties converting RGB_R RGB_G
RGB_B to/from XYZ_X XYZ_Y XYZ_Z. Help please!
Best regardsPrat
> Date: Mon, 26 Sep 2011 09:38:37 +0200
> From: baruchel@xxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] What exactly are the STDEV_R etc. columns in a ti3 file?
>
> On Sun, 25 Sep 2011, tb wrote:
> > Could you show to me such a "basic", clean and simple TI3 file (or cgats
> > data txt file) for such a six-column-based set of data?
>
> OK, I finally could find some of them:
> http://www.freelabs.com/~whitis/reviews/230X_USB_Microscope/Camera.ti3
> http://lj.vladimirovich.net/lj11/spectral/4500.ti3
>
> But I have some more questions concerning the format:
> SAMPLE_ID XYZ_X XYZ_Y XYZ_Z RGB_R RGB_G RGB_B STDEV_R STDEV_G STDEV_B
>
> Could you confirm that columns XYZ_X, XYZ_Y, XYZ_Z are the "target" (the
> intended colors?)
>
> Could you confirm that columns RGB_R, RGB_G, RGB_B are the "seen" colors?
>
> I can't really figure out what are the three last columns:
> STDEV_R, STDEV_G, STDEV_B
> What do they mean?
>
> By the way, why can I find on several ti3 files on the web:
> KEYWORD STDEV_R
> KEYWORD STDEV_G
> without a line for STDEV_B ?
>
> Best regards, tb.
>
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