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That is some really nice target. I might 3D print your aligment ruler this weekend and give it a try. However not sure if @x64 already managed to enable the possibility of randomizing the patch configuration in order to match the csv data with a scrambeld ti2 file in order to generate the ti3...

Hi Micronica: there is some cheating involved: I use photoshop to stretch and squeeze the whole thing for the patches to become square: this is not possible with printtarg only: you will end with elongated patches as always. my command is: printtarg -v -ii1 -r -b -A0.5 -T360 -M8 -p155x240...

Here is the 266 patch target for A4 for the CR30 colorimeter: It has 21 grey steps.

What I would suggest to add an extra option to enable/disable space bars (wether black/white (-b) or colored (-c) ) and also the option to change space bar(-A.xx) width and use 8 or 16 bit resolution for the patches ( -t360 vs -T360: 8 versus 16 bit patches at 360 dpi resolution) EDIT: I...

One thing: since the target is meant for RGB printer profiles, you should NOT enable custom ink limits: this can cause pooling when your paper does absorb that much ink. That function is meant for CMYK printer profiles, where it is very important to determine ink limits. So if you generate a...

That was some fantastic job: also using multithreading dramatically accelerates the profile making process with a multitude

Today I did again a test with the larger 247 patch target that has extra grey steps and it really does a fantastic job the CR30 with ArgyllCMS. I used my difficult Canon TS705 that tends to print greys in a rather brownish sepia tone instead of neutral greys without proper profiles. The target...

OK here you are: I have 2 sets one for the 228-patch target and one for 247-target, so you can have a look at both The idea is that the python script can be extended to any desired patch size and if possible that a randomized patch order is also converted correctly. At this moment the script...

Great to see you guys stepping in to help each other with their own specific knowledge in order for the greater good. Despite the incredible possibilities of ArgyllCMS it still remains a bit cryptic and an graphical user system that is easier to use than the previous attempts were still a bit...

OK, I just generated a larger patch set target for the Colorimeter to be printed on 2 sheets of A4. It has twice amount of patches compared to the previous 247 patch target.

@x64 : You were right the randomisation was the cause of the hanging of the colprof process. I now have changed the patch layout to be non-randomized, but in doing so the grey ramp is sometimes difficult to determine where the next grey patch starts. To visually overcome this I have introduced a...

OK, now I understand the underlying problem. I will regenerate the the ti2 not the use random order and remove the extra data: these are values of the spectral data at 360-390 nm and from 710 to 780 nm. Thanks for the update.

Running almost 3 hours: the process is still hanging: Not sure what is causing it: it does not give an error that some data is wrong or corrupted, just hanging. The previous 228-target works flawlessly. But I tried a slightly larger patch count of 247 (one extra row of 19 patches added), but...

I am struggling with the larger 247 patch target. There is not the same error as previous, but running colprof.exe and the system tends to hang without any error message and does not proceed: @x64 : maybe you can have a look at, not sure what is wrong with it and can you produce a profile...

@Epatcola : that is a fantastic design you have made....making it possible to scan miniature patches as well. That will greatly increased the amount of patche on a sheet of A4/Letter.

yes indeed, likewise my i1Pro1 and i1Pro2 white tile also is bound with a seria number to the device and cannot be exchanged, because each tile/spectro combo is factory calibrated to match.

I will try to reread the target again, because maybe the problem is on my side. Normally the distribution of the test samples should be ok, as the targen.exe argument -G is enabled (good distribution). I will give it a try again and report back. Meanwhile I could generate a profile using my...

Mine reads a white point of the tile: 91.22 -1.09 0.17 probably not a concern, as each tile is bound to each individual spectro.

ok today I tried a newer 247-patch target and unfortunately there is an error when executing colprof: The message: warning: colprof: Warning - gammap internal: input bounds has changed !.... @x64 Could it be there is a conversion error from mapping the ti2 file to the csv file to generate...

yes it has a white tile to calibrate on: it is magnetically attached on the spectro.