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How about actually printing, then laminating on a lenticular surface providing a "GIF-sized" short moving-image effect?

[edited per comments]

I presume you mean "lenticular" - which would be a very cool (and possibly mass-producible) alternative. I wonder how you might go about performing the lamination inside the camera... Perhaps you could feed it a pre-laminated sheet that is thin enough that it can be printed on the reverse side?

I would imagine that such a device would be difficult to build so that it works correctly the majority of times it is used. Even if the "reverse printing" idea could be done (I like the idea, btw), it would have to be extremely exact to line up the "pixels" of the images with the individual lenses. Perhaps a print-head with some kind of camera on it to see where it is printing as the head passes over the lens could be done?

Recall that these kinds of "motion picture cards" have been around for decades; at least 40 or 50 years, maybe longer. If such a camera (or even a home-based process) could have been built for consumer use, it probably would have been sold. The fact that it wasn't, and the fact that even during all these years there haven't been many manufacturers of such images, should give you an idea of how difficult registration of the image stripes with the lens can be. A purely mechanical process (printing the image onto some kind of paper, then laminating the lens over the top) probably can't be easily (or cheaply) done - otherwise it likely would have been.

That's just my take on things, of course; maybe I'm completely wrong, or there's some method or such I am missing that could make the system easier to build today? I do think the idea of "reverse printing" might be a step toward it. I can't think of how you'd build such a thing to be hand-held, but I can imagine a desktop-sized machine being potentially possible (again, using some kind of close-imaging camera or some other method to register the printing of the images with the individual lenses on the plastic).

Well, things that may not have been possible printing-wise 10 years ago could be possible today. Meanwhile, in the same time period, the world as a whole is moving away from physical media, so I don't think there's many people working in this space. This is just to say that I wouldn't be surprised if it were possible today, it's just that no one has cared.

Perhaps you could sidestep the “printing” issue by pre-laminating some kind of detachable e-ink display?

It'd also be reusable!

The lenticular surface doesn't have to be very thick at all and if you can print directly onto the plastic I think what you describe would be pretty straightforward to make!

Could print on the lens sheet then put a white sticker on the back. The sticker would protect the print as well as provided white background.

Well there we go. Just fit it into a handheld printer.

That's a great idea. I can imagine a simple hack that modifies a Polaroid Snap [1] or similar so that it prints a lenticular-compatible image, then sticks on a lenticular lens automatically. It might be challenging to keep the lens in alignment with the picture, but I think there are many clever solutions to that issue.

[1] https://www.bestbuy.com/site/polaroid-snap-10-0-megapixel-di...

rectilinear? Do you mean lenticular?

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