Quoting Milan Kní?ek <knizek.confy@xxxxxxxx>:
I certainly wouldn't trust this method in the general case. First off, you're likely to get moire patterns (I have seen this a lot when shooting LCD monitors). Furthermore, because most camera sensors have considerably higher resolution than most LCD monitors, you'll likely be able to see the individual monitor sub-pixels fairly well, which will likely cause interesting forms of quantization noise.Hi all! I am aware that it is not usually recommended to use IT8 targets for preparation of ICC camera profiles for colour rendering of real scenes. Since one of the reasons is smaller gamut of IT8, I thought about use of a calibrated and profiled display (supporting near to Adobe RGB colour space). I did some research with Google and found that this is already patented in the USA: http://www.patentstorm.us/patents/6654493.html Have anyone tried to use calibrated and profiled display to create a profile for digital camera and got good results? Would it make sense considering low-end display calibration tools (Eye One II, Huey)?
Finally, when you string together measurements like this, your measurement errors will accumulate and, unless they're very well-controlled, kill your accuracy.
I haven't heard of the IT8 problems you're referring to. However, I'm fairly confident that your IT8 results will be much better than what you'd see from an LCD monitor.P.S. At the moment, I use ICC profile in UFRaw (linux) based on IT8 target, since it usually gives me better results than other alternatives (no profile, colour matrix, profiles from RAW converter by Canon).
--xsdg
