anfractuosity

Yeah I do remember hearing good things about the Epson scanners, will have another look, thanks.

Hmm, does seem pretty expensive but sounds interesting. I've got an old Canon FS4000 for 35mm, which works ok for me. I'm curious what people recommend for 4x5 film.

Is there such a thing as a cheap drum scanner.

Has anyone bought un-cracked geodes before? I've not had much luck with those so far.

Do you have a link to that, sounds cool?

A linear scanning mechanism would be a lot faster still than the XY approach.

I'm very curious how expensive sensors are though, that capture this data in a single shot, I've not seen any prices so far.

Yeah definitely, I've not looked at papers relating to microscopy with hyperspectral cameras. That might be especially interesting with samples that fluoresce.

The much faster way is to move a slit in front of a diffraction grating and use a 2D sensor behind that, that way you can obtain multiple spectral patterns simultaneously, see the video I mention at the start - https://www.youtube.com/watch?v=L_u8NqmgElU

Thanks for the link, not come across that before.

The hardware itself doesn't appear to be open though? - "Blueprints are available on case by case basis"

It seems a bit disingenuous to call it holographic doesn't it? I believe https://en.wikipedia.org/wiki/Integral_imaging is the technology. It has similarities with lenticular prints.

I found this print that uses 'Integral imaging' https://www.youtube.com/watch?v=f0MP6mW7BW0

https://opg.optica.org/ol/abstract.cfm?uri=ol-49-8-1876 appears to be a real holographic display.

Yup the following seemed to work for me -

news.ycombinator.com###hnmain > tbody > tr:first-child:style( position: sticky; top: 0; z-index: 10;)

Why wouldn't propagation create further glowing plants, they're genetically modified?

https://light.bio/ looks more interesting than injecting glowing substances

Heh, I just came across this though "Our Firefly Petunias are protected under patent, and as such, propagation and breeding are not permitted. These petunias are sold exclusively for personal use."

Edit: https://patents.google.com/patent/US11913033B2 curious if anyone has come across DIY versions?

Did also find - https://en.wikipedia.org/wiki/Glowing_Plant_project

Cool, thanks for the heads up!

Nice article, I came across very cool Python library recently too re. colour science - https://www.colour-science.org/

Just started playing with it with my spectrometer based on one of the examples they have, to convert spectral data to a single RGB value.

Interesting thanks, that's faster than I thought it'd be.

Very interesting, curious how long it would take to brute force the 56 bit key, with something like a GPU/FPGA. It looks like hashcat supports DES, which is also 56 bit.

Don't suppose anyone has seen in person one of the clones of the flipper zero that are on Aliexpress?

Heh, very fun :) I've not come across any locks yet thankfully, in it!

Are you sure it's cheaper than a glass hydrometer, you can get one for around £3

I'm working on 3D printing a lens mount and battery holder for Canon EF lenses to a night vision tube I've got (https://github.com/anfractuosity/darkplace).

As well as been playing with creating plastic keys using a flatbed scanner with the printer.

You might also be interested in this - https://docs.backyardbrains.com/retired/experiments/Plants_V... where they monitor the electrical spikes of the traps.

You can also apparently electrically trigger the closing of fly trap - https://www.tandfonline.com/doi/full/10.4161/psb.2.3.4217

I didn't think a single photosite was directly converted to a single pixel, there's quite a number of different demosaicing algorithms.

Edit: Upon doing some more reading it sounds like a photosite or sensel, isn't a group of sensors, but a single sensor, which can pick up r,g,b,.. light - "each individual photosite, remember, records only one colour – red, green or blue" - https://www.canon-europe.com/pro/infobank/image-sensors-expl...

I couldn't seem to find a particular name for the RGGB/.. pattern that a bayer filter consists of an array of.

Yeah, I'd not heard of that either, I recall postcardware though - https://en.wikipedia.org/wiki/Shareware#Postcardware

There's a Gameboy clone made by kongfeng that seems kind of like this, with its own chip. I'd love to know more about how they created it.

I got my laptop to play Taylor Swift on the AM band - https://www.youtube.com/watch?v=KH9yb1qFKDY by twiddling the memory bus (sounds a bit iffy ;)

Code: https://github.com/anfractuosity/musicplayer

Based on the work of https://github.com/fulldecent/system-bus-radio

Very cool photos, nice to see rocks from a perspective I'd not seen before.

I came across this recently - https://en.wikipedia.org/wiki/Thermoluminescence where it sounds like some rocks emit light upon heating.

I rather liked 'The Idea Factory: Bell Labs and the Great Age of American Innovation'

Longitude is a great book, I thought this was cool too re. one of the clocks Harrison designed - https://www.theguardian.com/science/2015/apr/19/clockmaker-j...

https://consc.net/notes/lloyd-comments.html has some more info