On vendredi 23 juin 2017 19:50:29 CEST I. Ivanov wrote: > I tried to calibrate the TV to some extend (and I still use it this > way). In a nut shell - I turned of all improvements that the TV offers > like eye care or dynamic contrast (whatever I was able to find out) - > these can be turned back on after the calibration if you wish. Are you sure about that? I always understood that a profile was only valid for the device settings with which it was created. Changing the device settings implies generating a new profile...
> I used > chromecast and with it - spyder 5 and displaycal. With this - in expert > mode of the TV - I was able to tweak brightness and adjust it as per > what spyder 5 was detecting. Then I was able to adjust the RGB values > independently and again - spyder 5 would detect it. > > But this is where all ended. Displaycal would show patches on the screen > and spyder 5 would measure them but there is no known to me way to load > the generated profile on the TV. > Iirc, in most cases a monitor profile is used to correct an image before it is sent to the monitor (or TV, in this case), so it resides, and is only used, on the computer driving the TV. > If you use the computer to calibrate it - over hdmi cable - it would be > only valid while the computer is plugged in. Which follows from the above. > Professional services charge quite a bit but my understanding is that it > still boils down to measuring on the screen and adjusting manually the > controls. Actually, there are 2 phases. First, you try and get the device as close as possible to the ideal rendering as you can with the (hardware) controls. That is the calibration phase. Then you measure the response of the monitor against a number of defined colours, from these measurements you calculate a correction table or function that's to be applied to all images sent to the monitor (profiling phase). With most standard hardware (amateur level) this profile is stored and used only on the computer driving the screen device. Perhaps this is different on high grade (professional) screens? And I'm not surprised that calibration and profiling done by professional service is pricey, it's rather time consuming if done correctly. On the plus side, the generated profiles should be valid for quite a while. Remco ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
