2009/7/23 Graeme Gill <graeme@xxxxxxxxxxxxx>: > the above discrepancy > may actually reflect the inaccuracy of the generic instrument calibration > matrix that Argyll has to use, rather than any deficiency in Spectraview. I started thinking Spectraview II was not so good after checking the profile I made with it: Profile check complete, errors(CIEDE2000): max. = 14.525016, avg. = 5.885476, RMS = 6.473750 Same test chart used before. An average error of _6_ and a maximum error of _15_! Unbelievable! > I'm not sure why you are referring to the DE 2.7, > which is the hardware calibration white point delta E, since > the profiles will represent the behaviour of the device as > it is, and hence are not affected by any absolute white point > inaccuracy's. In the real world the accuracy of the calibration affects the goodness of the profile. Since the white point was wrong I (wrongly) thought that the calibration too could be of poor quality. > Without access to > the device in order to look at all the details, it's hard > to explain exactly why certain combination work as they do > 200 points it's probably too small a number for verification > checks though. 1000 would be better. Every manually-set setting that affects the calibration is overrided by Spectraview II before doing the calibration (in my previous mail I linked screenshots of the Spectraview II settings). I'll repeat the test with a LUT profile and 1000 patches. [I used few patches and shaper/matrix because my real problem is with photoshop soft proof and I was also doing some tests trying to solve it. I'll open a thread about it as soon as I'll have gathered enough information about it.] One more question: This[1] is the linear curve loaded in the monitor if no calibration software are installed in the system (here[2] you can see the dump). This[3] is the non-so-linear curve which both Spectraview II and Argyll consider linear and load in the video card LUT before doing the calibration (here[4] you can see the dump). I cheched it in my PC (I have an Ati) and in another PC with an Nvidia card. Thank you, Darkbasic [1]http://darkbasic.homelinux.com/images/sv2/sv2_12.jpg [2]http://darkbasic.homelinux.com/varie/reset.txt [3]http://darkbasic.homelinux.com/images/sv2/sv2_11.jpg [4]http://darkbasic.homelinux.com/varie/photo_editing_120.txt