[HN Gopher] Lenticular Clock
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Lenticular Clock
Author : animal_spirits
Score : 181 points
Date : 2024-08-19 19:32 UTC (1 days ago)
(HTM) web link (www.instructables.com)
(TXT) w3m dump (www.instructables.com)
| andrewla wrote:
| I'm most blown away just by the very existence of lenticular
| sheets -- I didn't know that this was a general-purpose thing
| that you could do at home Years ago I paid for a 3d lenticular
| photo print but I always assumed the technology to do so was out
| of my reach.
| ljf wrote:
| I took a photography course in the 90s and we did some 3D
| images that you looked at two photos through a viewer or by
| going cross eyed. The teacher tried to get us to invest in some
| lenticular pictures but the cost for a 16 year old was just too
| much. As I understood it back then, they cut your 2 images into
| very thing strips and then interleaved half of them. I'd not
| thought of it much since but of course it makes sense that a
| good photo printer and the right software could make this all
| far simpler.
| stavros wrote:
| This is really cool! I had no idea you could just buy these
| sheets, I always thought you have to make them specially. The
| fact that you can buy them and then print a pattern is amazing.
| calebm wrote:
| I love lenticulars. I'm working on writing my own lenticular
| software right now. You can see some of my lenticular math art
| here: https://gods.art/
| silvershell wrote:
| Amazing work!
| JKCalhoun wrote:
| I did some experiments creating lenticular 3D and failed
| miserably. I'll look at what you got.
|
| I would love to see the software, BTW.
| theferalrobot wrote:
| Those are amazing! Are you hand aligning those lenses on the
| print or is there some sort of tooling/hardware/service that is
| capable of it?
| calebm wrote:
| Hand aligning is the only way I know of.
| mordechai9000 wrote:
| Any chance you could share the math behind the pixel
| snowflakes?
| hnlmorg wrote:
| I'd love to know more about the floating exclamation mark in
| one of those pictures you've linked to
| calebm wrote:
| I just walked into the room and that was there. After some
| examination, I realized it is a projection of the forest
| behind our house shining through a crack in the window.
| dr_kiszonka wrote:
| I love the Give and Take one.
| alt227 wrote:
| When I click on a piece of art on your website it takes me to a
| page with an unhappy face and a message that says "No video
| with supported format and MIME type found".
|
| Using Firefox 129.0.1
| mkesper wrote:
| It's a MOV tagged as video/mp4. For me, FF recognizes only
| the audio part but if extracting the raw video URL I can play
| it with vlc.
| Hello71 wrote:
| They're the same thing. The problem is not the container,
| it's the H.265 encoded video which Firefox doesn't accept.
| It's not a good idea to throw raw cell phone video onto a
| website, first because it probably won't play everywhere,
| and second because there's embedded high-precision location
| data.
| calebm wrote:
| Thanks for the bug report.
| navigate8310 wrote:
| Hexagonal Jewel Tunnel looks like a hyperdrive into space
| Karliss wrote:
| I like how you chose the content of drawing so that it's
| complemented by lenticular effect instead of fighting against
| it. In many typical lenticular pictures that attempt to show an
| animation or 3d effect, there are angles in which you partially
| see two images thus ruining the picture by making it look
| blurry/striped. Not sure if it looks equally good in real life,
| but at least in the videos of your art the color gradients
| seemed to produce much smoother transition, which doesn't break
| the picture even when you partially see two consecutive frames.
| calebm wrote:
| Yes, if you want to do good lenticular art, you want nice
| smooth transitions (on a pixel-by-pixel level).
| ljf wrote:
| These are amazing - I'd love to buy one, if you are selling
| your art. Though shipping to the UK and import tax would
| probably make this prohibitively expensive.
| calebm wrote:
| I am selling. I can be contacted at caleb@gods.art. I'm
| really not sure how much shipping/tax would be to UK (never
| sold internationally).
| evan_ wrote:
| those look great, you should post a Show HN about them. I'd be
| interested to know more about your process if you're
| comfortable sharing.
| MaximilianEmel wrote:
| Won't this show the wrong glyph if you're looking at it from the
| wrong angle?
| JKCalhoun wrote:
| I suspect short people and tall people will likely disagree
| about what time is shown.
| ralferoo wrote:
| This must be what people mean when they say they are short on
| time.
| borski wrote:
| Honestly, that might be my favorite part
| gmiller123456 wrote:
| You notice you're running late, so jump up, and now you're
| early.
| BeetleB wrote:
| Well, time dilation and length contraction do occur at
| relativistic speeds :-)
| o11c wrote:
| Hm, could that be fixed by covering it with a "privacy screen"
| (used to cover computer screens, basically a bunch of tiny
| parallel tubes (all-angle) or grooves (one-axis, probably best
| for this))? Then maybe a blur on top of that to increase the
| viewing angle again (though that might cut the light too much
| since it's not an active emitter)?
| augusto-moura wrote:
| Maybe a pinhole and lens? Like a camera but having only the
| clock inside a chamber
| romwell wrote:
| >Won't this show the wrong glyph if you're looking at it from
| the wrong angle?
|
| Time is relative (to your height).
| GauntletWizard wrote:
| I'm actually really disappointed this wasn't addressed with a
| fairly obvious "checksum" mechanism - Including the ":" in the
| center, and giving that it's own lenticular pattern, such that
| only when viewed from the right angle do you see the : and
| otherwise you just see numbers.
|
| (I'm not sure if this is really plausible - Are the numbers
| close enough that that would actually work? If you're off to
| the right or left, or too high or too low, could you
| potentially see the : with a different set of numbers than
| intended?)
| hunter2_ wrote:
| Seems completely plausible to me, and elegant to boot. To
| minimize design change, the product name could be the
| alignment check.
|
| {You being too high/low} and {the angle of the numbers/check
| being wrong} are two ways of saying the exact same thing when
| ignoring the world beyond you and it, like using a handheld
| mirror.
| Someone wrote:
| Utterly impractical as a clock. Brilliant hack.
|
| I guess version two will add a camera, an eye detector and two
| servos to orient the clock to create a real-live hybrid of xclock
| and xeyes.
| drjasonharrison wrote:
| given that the display is viewpoint dependent, you need to
| orient this clock to make it usable from a variety of vertical
| viewing angles
| eru wrote:
| The old Google badges used to have lenticular images, too.
| (Perhaps they still do? I haven't been working there in a while.)
| shibbidybop wrote:
| They were swapped out earlier this year for boring flat-image
| badges. Major bummer.
| eru wrote:
| Hah, that will make tail-gating behind a Googler by just
| flashing my old badge so much harder.
| dr_kiszonka wrote:
| Lenticular postcards were relatively popular in the 60s and 70s
| (iirc). A family member brought some from Japan and I was
| fascinated by them. Sadly, they got lost over the years :-(
| 082349872349872 wrote:
| A friend had a special lenticular camera, but that was ca. 1990
| and he had to send the film away to get lenticular cards back,
| so even if you can find a camera, you may have to reverse
| engineer the printing/mounting process.
| sdflhasjd wrote:
| I had some success making lenticular sheets using a 3d printer by
| printing a single-walled cylinder using a clear PETG, cutting it
| up and flattening it out using a heat gun. You can use the layer
| height to control "LPI". One problem is that it's double-sided,
| which reduces the quality quite a bit.
| mhb wrote:
| Also, one of many digital sundials:
|
| http://www.mojoptix.com/2015/10/25/mojoptix-001-digital-sund...
| illwrks wrote:
| Very clever idea. I wonder if instead of a printed sheet if you
| could combine it with an e-paper display with an interlaced image
| and then you could load different image sequences...
| drjasonharrison wrote:
| Clever in the "nice job, but this is not a problem I have, nor
| a solution I would want to have to listen to..."
|
| - you could use an e-paper display without the stepper motors -
| you could use an o-led display and be able to read it in the
| dark - etc
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