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815fee.jpg
Lady Floating Song
815fee
After Gamal turns the lights back off, you read the cartridge's metadata.
REC_2277_03_05.vvf
play time: 00:01:09.70
created: 05 MAR 2277
by: HR_d2h5N2ZpcnN0>disquiet247
size: 330 GB
"So how does it work, teacher?", Maya asks as she once again cranes her neck to see the projection from different angles.
You think a moment, then put together the best explanation you can muster with the Kushani you know. Once again, as soon as you get going, the words just... come to you.
"The HoloRec uses a so-called DtR-display system, just like my hair. This is short for Direct-to-Retina, or Direct-to- uh... what's the light-sensitive skin in your eye called?"
"The retina? The tissue layer with the light-sensitive neurons?", Gamal chimes in helpfully.
"Retina, thank you! Direct-to-Retina is what it means. Essentially, the device is covered in cameras so small you can only see them if you look very closely. They constantly scan their surroundings using image-analysis processes to find... well targets. They look for eyes and larger cameras, usually.", you say.
"Wait, wait, wait", Maya interjects, "What do you mean constantly? You mean they're... taking pictures and finding eyes in them? Like... Is that why it needs so many cameras? So that while one is processing, the next one can already take another picture?"
You can't help a smug little smirk here.
"Oh no. The processing takes barely any time at all. Each camera's input is processed over a hundred times per uh... well many many times in an instant. The high number of cameras is just for added precision, to accurately estimate depth. Via uh... Parallax? Okay nevermind that. Just... accept that the HoloRec always knows where everybody's eyes are and what direction they're looking and so on. I'd expect the entire facility to have these tiny cameras all over and the HoloRec might be networking with those to get an even better reading."
Maya looks equal parts amazed and confused. "Right, it knows where my eye is. I... Does it just beam light straight into my eye?"
That takes the wind out of your sails a bit.
"Uh... Well... Yes? Okay so... Now we get to the actual projection of the image. It uses those big flaps to align itself in the three-dimensional map with all the eyes in it and calculates what each eye would see if the image were actually there. Don't ask me how that works, it's probably really complicated. Anyway on startup, the HoloRec constructs a uh... a matrix out of Reflector-Nanites. Think of it as a... sort of invisible cloud made of extremely tiny machines that have a reflective surface. Then the HoloRec emits light particles into the cloud and the reflectors align in such a way that they bounce the particles right into your eyes."
There are five solid seconds of silence.
Maya reaches out and waves her hand above your head.
She seems to think for a moment longer. You're pretty sure Gamal completely checked out of that explanation partway through and is just leaving this topic to the two of you.
"I am not sure I fully understand it, but it seems like a staggeringly sophisticated system of interlinked technologies... unreasonably sophisticated for a 'toy'. The computational requirements alone must be immense!", she finally remarks.
You laugh. "Yes, it is honestly pretty overcomplicated. The issue with it is that for all its intricacy it's just not that practical. For most image-display use cases, two-dimensional will do and that's simpler and cheaper and less error-prone. Also it needs a darkened environment or you lose all but the most extremely vividly coloured parts and... Yeah it turns out there's just not a lot it is good for except novelty."
Maya nods with a thoughtful expression. "You know I was wondering how the image could shine so brightly without actually illuminating the room. I guess it somehow really does manage to only hit our eyes.", she muses.
"It is pretty precise, yes.", you say and after a pause, "I'm going to play the next one, yeah?"
Nobody objects.
"HoloRec, play!"
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