Registration/Alignment issue with Black plane on Magicard #48

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opened 2024-05-29 19:19:02 -04:00 by slp · 0 comments
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K extraction from RGB input data appears to work well, but when printing there's a registration problem. The black layer appears to print several pixels higher than the color layers.

I'm not sure if this is something that needs a fixed offset applied, or is something that can vary printer-printer.

On my old Tango 2E, the black data looks much better (but not perfect) if it's shifted down by 2 pixels. Might need to shift it over by one pixel too.

This frankly seems a bit suspicious given that the color registration is spot-on.

Or could one of the not-yet-figured-out firmware commands be there to adjust the K alignment?

K extraction from RGB input data appears to work well, but when printing there's a registration problem. The black layer appears to print several pixels higher than the color layers. I'm not sure if this is something that needs a fixed offset applied, or is something that can vary printer-printer. On my old Tango 2E, the black data looks much better (but not perfect) if it's shifted down by 2 pixels. Might need to shift it over by one pixel too. This frankly seems a bit suspicious given that the color registration is spot-on. Or could one of the not-yet-figured-out firmware commands be there to adjust the K alignment?
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labels 2024-05-29 19:19:02 -04:00
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Reference: slp/selphy_print#48
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