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Interesting, how does your software detect an uncalibrated monitor? Did it come with a calibration device which had to be used to scan the display output to che
by alias_neo 4y ago
Interesting, how does your software detect an uncalibrated monitor? Did it come with a calibration device which had to be used to scan the display output to check?
I don't suppose monitors report calibration data back to display adapters do they?
- GauntletWizard 4y agoMy guess is they had some heuristic based on EDIDs, which are incredibly easy to spoof. https://smile.amazon.com/EVanlak-Passthrough-Generrtion-Eliminated-Thunderbolt/dp/B07YMTMMH5/ref=dp_fod_2?pd_rd_i=B07YMTMMH5&psc=1 https://smile.amazon.com/EVanlak-Passthrough-Generrtion-Elim...
- gmueckl 4y agoYes, but why would you go to these lengths? The purpose of the whole mechanism is to prevent accidental misdiagnosis based on an incorrectly interpreted X-ray image. This isn't DRM, just a safeguard against incorrect use of equipment.
- GauntletWizard 4y agoPeople are cheap and corrupt. The speed bump this presents is real, but minor, in the face of a couple medical shops looking to save $100/pop on a dozen monitors. I hope it's rare, but I think a persistent nag window ("Your display isn't calibrated and may not be accurate") is probably a better answer than refusing to work altogether, because it will be clear about the source of the problem and less likely to get nailed down.
- gmueckl 4y agoYou have to draw a line somewhere, I guess. As far as I remember, protections against accidental misuse and foreseeable abuse of a device are required in medical equipment. But malicious circumvention of protections or any kind of active tampering are a whole other category in my opinion.
- kaba0 4y agoMedical devices are insanely expensive (a CT scanner may reach a million dollars), you won’t risk $100 on such a small thing as a screen.
- gmueckl 4y agoI didn't work on that specific software team and it has been a long time since I worked there. But the software came with its custom calibration routine and I believe that the calibration result was stored with model and serial number information from the monitor EDID.
- alias_neo 4y agoThanks, sounds like I need to do some reading about EDIDs; I knew _of_ them but no real understanding is what they are and what they do.