Printer Profile Validation: M1 vs. M2 and ΔE2000 Evaluation

[know]

Clarification:

My preliminary investigation suggests that NCM is misconfigured. Strip indicators, spacer color and size, and patch width and height do not appear to be contributing factors.

What do you mean by NCM? I might just be too inexperienced to know what you refer to...

Knut

 

[itsab1989]

I’ll definitely give it a try!

Meanwhile, I encountered difficulties measuring the 192-patch chart, as data from certain strips could not be captured. In contrast, the 576-patch chart was measured without any issues.

I randomized the patches, but it didn't really fix the issue.

View attachment 19390

Instrument: i1Pro 3
Printer: CP1500 4 × 6-inch dye-sublimation photo printer (Glossy)

Chart 192 Patches 10x15 cm
ArgyllCMS 576-patch target + 64 greys

Although I am not 100% sure maybe the issue is the very tight space between the patches and the other element on the sheet. The measurement should start and end on paper white so everything can be recognized correctly. So maybe it helps to turn off the colored strip and the markers.

 

[know]

Although I am not 100% sure maybe the issue is the very tight space between the patches and the other element on the sheet. The measurement should start and end on paper white so everything can be recognized correctly. So maybe it helps to turn off the colored strip and the markers.

You are totally right! I did not think of that...

You have to change the helper markers to have only 2 markers, not three, or turn them off. Then you will not have that one marker in the way that might prevent the instrument to end on a white patch... Look in Create Chart tab, under manual mode, then scroll down to the helper markers in the Expert Options frame, see below image. The presets made inside ChromIQ have 13mm bottom margin, minus the 4 mm used by the helper markers. This is just enough to stop the i1Pro unit on the white patch. I see you have used some other created patch layout someone made, and it seems there is not enough space at the bottom margin. If you do the above, you should get more space for the strip-end, of you may of course use the in-built presets.

Presets:

 

[jctay]

What do you mean by NCM? I might just be too inexperienced to know what you refer to...

Knut

NCM = No Color Management
A term frequently found in older forum discussions.

[ Reference ]

 

[pharmacist]

I second Knut with those markers on small paper sizes (like 10x15 cm photo cards) to disable those markers, as it often throws errors when scanning those minitature targets as the spectro will end on a black stripe and throws an error that too much patches are detected (or in some cases not enough patches).

On the left (create test chart), you can see "expert options": click on the arrow button to open this menu:

scroll down until you see this:

uncheck "Print helper markers" and press the "generate chart" again to obtain this:

those tiny marker stripes are now gone, or you can reduce to only 2 markers so the scanning eye will be between two marker stripes (which is maybe a better compromise), ensuring the spectro will certainly begins and ends on paper white.

You can elongate those marker stripes (here from 2 to 8 mm):