On Sunday 27 September 2015 10:47:51 Mick wrote: > On Sunday 27 Sep 2015 09:58:43 Peter Humphrey wrote: > > I do have the two .icc files in .local/share/icc: > > > > $ ls -l .local/share/icc > > total 28K > > -rw-r--r-- 1 prh prh 1.2K Sep 9 16:51 > > edid-fbec4f9c1804ea718b6e1b585fc234ad.icc -rw-rw-r-- 1 prh prh 21K Sep 10 > > 10:41 GCM - Samsung - SMS27A350H - unknown (2015-09-10) [04-58-44].icc > > > > /usr/bin/file shows them both as "ColorSync ICC Profile". I don't know why > > there are two, nor why they have such different sizes. > > I'm guessing that the 'edid-fbec4f9c1804ea718b6e1b585fc234ad.icc' was > extracted from your monitor's EEPROM chip through the i2c bus and saved on > disk by the LiveCD you ran, but the 'GCM - Samsung - SMS27A350H - unknown > (2015-09-10) [04-58-44].icc' was generated by the colorimeter during your > calibration exercise. > > I'm also guessing that the smaller size of the first file is because your > monitor's EDID is of an earlier version, e.g. EDID-v1.1 or some such, which > used to only contain a 128-byte data structure. I seem to recall that very > early EDID versions didn't even contain colospace and Gamma data, but may be > wrong.
I've just visited the Taxi site you mentioned to see what's there for my monitor. Nothing! So I tried uploading my ColorHug data. The page asked for a metadata file and a profile data file, from which I supposed that my smaller file is metadata about the content of the larger one. But when I tried to upload the two files on that assumption I got a server error. Same when I tried them the other way round. Looking at the larger file with less, I find eight lines of binary data at the head followed by 400-odd lines of legible textual data. Interesting stuff, though of course I don't know what to do with it myself. > These are [Mick's] sizes : > > ls -n ~/.local/share/color/icc/devices/Display/ > total 800 > -rw-r--r-- 1 1001 1001 1944 Sep 18 18:16 ACI ASUS VS239 > EALMTF200702_edid.icc > -rw-r--r-- 1 1001 1001 2016 Sep 18 18:16 Dell Computer DELL ST2320L > MP82K0712EJL_edid.icc > -rw-r--r-- 1 1001 1001 20884 Sep 18 19:01 P2311H 2012-06-20 2.2 MQ-HQ > 3xCurve+MTX.icc > -rw-r--r-- 1 1001 1001 783804 Sep 18 19:02 PA248 2015-04-18 S XYZLUT+MTX.icc > > The first two are from the monitors' EDID content, the latter are the > profiles I downloaded from the Taxi DB. Some of these contributors' > profiles were created with spyder or other expensive colorimeters, so I am > surmising that they capture more data points and contain more information, > than the manufacturers EDID which is primarily contains other than > colorspace and Gamma data. Lucky you! As I said, my monitor hasn't made it into the database yet. And it seems I can't contribute to it either. -- Rgds Peter
