[Printers] Re: color inkjets

[Pat Wood]

There's no reason why the yellow dot approach wouldn't work on inkjets.

The Purdue "banding" technique looks interesting.  It would also work on B&W printers,
and also might work on inkjets, as the mechanics there are really cheap, so there's
probably a lot of variance between devices.  It also may be possible to defeat this
technique by adding noise to the input power, either by twiddling the voltage or
frequency.  The problem is that the laser will have a power supply designed to filter
the incoming AC, so the trick is to find out what the tolerances of that supply are and
mess with it just enough to disrupt the imperfections being added on purpose.  If they
can add imperfections that are below the visual threshold but still detectable, it should
also be possible to disrupt it, although perhaps with some degradation of image quality.

I also find it interesting that they talk about measuring these imperfections on text, but
it's really much easier to detect them in halftones (their example is an image, not text).

Pat Wood