[argyllcms] Re: i1 Display bundled with Samsung XL20
- From: Gerhard Fuernkranz <nospam456@xxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 13 Jan 2009 01:22:49 +0100
Graeme Gill wrote:
> My guess from an engineering point of view would be that it contains
> a standard calibration, and that any special adjustment done to suite
> the display would be in the software that accompanies it, but one
> way to tell would be to dump the calibration matrix by turning
> on #define DEBUG in i1disp.c, and comparing it to another device.
>
> For my (non-XL20) i1display I get:
>
> LCD/user cal[0] = 0.092167
> LCD/user cal[1] = -0.003769
> LCD/user cal[2] = 0.024447
> LCD/user cal[3] = 0.001060
> LCD/user cal[4] = 0.060454
> LCD/user cal[5] = 0.000752
> LCD/user cal[6] = -0.000367
> LCD/user cal[7] = 0.000713
> LCD/user cal[8] = 0.161666
Thanks Graeme! My matrices are
Version string = 6.000
Version character = 0x4c = 'L'
serial number = 825172
LCD/user cal[0] = 0.084293
LCD/user cal[1] = -0.001766
LCD/user cal[2] = 0.022930
LCD/user cal[3] = -0.000310
LCD/user cal[4] = 0.058202
LCD/user cal[5] = 0.001093
LCD/user cal[6] = -0.001765
LCD/user cal[7] = 0.002765
LCD/user cal[8] = 0.140559
LCD/user calibration time = 0x45d3f6f4 = Thu Feb 15 07:00:20 2007
user cal flag = 0xd
CRT/factory cal[0] = 0.085171
CRT/factory cal[1] = -0.001949
CRT/factory cal[2] = 0.020907
CRT/factory cal[3] = -0.000824
CRT/factory cal[4] = 0.056916
CRT/factory cal[5] = 0.000868
CRT/factory cal[6] = -0.002336
CRT/factory cal[7] = 0.002253
CRT/factory cal[8] = 0.142963
CRT/factory flag = 0x45d31629 = Wed Feb 14 15:01:13 2007
Since the rationale for the matrices is the individual calibration of
each instrument, I guess that comparing just the matrixes from just two
instruments may not necessarily be too meaningful. I could also imagine
that a particular relation of some sort between the LCD and the CRT
matrix (for instance inv(CRT_matrix)*LCD_matrix ?) may be more invariant
between different instruments than the calibration matrices themselves.
To get a feeling for the typical dispersion between different
instruments, it would be great if some other owners of an i1 Display
could kindly post their matrices as well.
Thanks,
Gerhard
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