Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

A Canvas Made of Pixels

claybavor.com

Post reply on HN
Print view View original

81–90 of 111 posts

Re: A Canvas Made of Pixels

#81

Post by morgante »

hamburglar wrote: post #75
soneca wrote: post #7

Earlier quoted context omitted.

Thanks for the explanation, that was great! I imagine you could play Where's Waldo without changing screens. Just "find the next Waldo" on an ever changing scenario. The moment you find one, another is created at other spot. Could be very addictive, although sounds kind of stressfull also.

You could also just have it decide exactly when it wants you to find Waldo. Imagine you had a Where's Waldo ipad app that had 20 different "pages" and you could set the amount of time it takes to get through them all so you could keep your kid busy for a guaranteed minimum time. :) Or even better, it's listening for you to say "ok, it's time to go in two minutes. Finish up," and it makes sure Waldo appears where the…

That's brilliantly evil. Part of me wants to implement it just for the evil factor.

Re: A Canvas Made of Pixels

#82

Post by morgante »

stevewilhelm wrote: post #43

"Visitors to Microsoft chairman Gates' new mansion in Medina will find themselves in an electronic Disneyland where they will be able to "call up" a favorite painting or photograph on combination TV-computer screens. "Right now, only a billionaire could afford to try $80,000 monitors and $150,000 computer-storage devices (the house could have several) that may be needed to make this all work." from "Bill Gates: 50,00…

And now you only need to be a millionaire.

Re: A Canvas Made of Pixels

#83

Post by scott_s »

soneca wrote: post #7
Phemist wrote: post #3

>> A fun (but impractical and frustrating) variant of this feature is to have the image change as soon as the viewer looks away. So you’re looking at a painting, glance away to another room, and look back to find a new painting hanging on the wall. Re this comment. There is this thing called "saccadic masking", the gist of which is that we are effectively blind while our eyes move from focusing on one position to the…

Thanks for the explanation, that was great! I imagine you could play Where's Waldo without changing screens. Just "find the next Waldo" on an ever changing scenario. The moment you find one, another is created at other spot. Could be very addictive, although sounds kind of stressfull also.

Or it places Waldo just outside of your field of focus, and constantly moves him as you look around.

Re: A Canvas Made of Pixels

#84

Post by kedean »

Phemist wrote: post #15
cocoflunchy wrote: post #4

Earlier quoted context omitted.

This is also the principle behind foveated rendering ( https://en.wikipedia.org/wiki/Foveated_imaging ) where you only render the graphics in high detail where the viewer is looking, and use a low-res image for the rest with the goal of saving computing power. Big area of development right now for VR!

That's really cool! I'm not 100% sure, but what I remember from reading a few psych papers about this is that as long as the "mask" is similar to the original in a few easy to calculate sampling statistics (colour distribution, overall hue), it doesn't actually need to look anything like the original image, even calculating low-res imagery shouldn't be necessary. Our peripheral vision is just that bad (at least for s…

Hey, something I know about! I actually worked on one of those research projects in college, programming the experiments. The idea is that there is a certain radius around the focal point where you stop being able to detect changes. I'm not sure what the final results were, but the theory was that you can calculate how blurry an image can be and still be discernable based on how far it is from the focal point of your vision. It was surprising how good people are at detecting changes in a blurry picture that's way out in their periphery.

Re: A Canvas Made of Pixels

#85

Post by morsch »

KingMob wrote: post #60

Thisi s cool, but to really reproduce art, you have to avoid RGB-based displays. I've always assumed the reason wide-gamut/CIE L a b*-influenced displays are uncommon is that RGB is "good enough" for most purposes outside of image-editing/printing. But they can only show a fraction of the colors humans can see. IIRC, the standard sRGB space used in most monitors can only show a third of the human-visible spectrum.

Yes, that seems like a huge limitation. Though the 5k iMac is wide gamut, so quite a bit better than sRGB. Are there even (consumer?) displays that have a significantly wider gamut?

http://blog.conradchavez.com/2015/10/26/a-look-at-the-p3-col...

Re: A Canvas Made of Pixels

#86

Post by morsch »

theon144 wrote: post #40

Awesome! I really love the usage of the photodiode, as well as the camera, both are pretty thoughtful finishing touches that elevate this to more than "a cool digital frame". How much does the display cost, if I were to make a frame like that too?

The cheapest 5k iMac is $1799, other comparable displays are roughly in the same ballpark. I imagine the other items (frame, sensors) are trivial compared to that expense.

Replacement 5k panels for the iMac (LM270WQ1) are merely $800 on AliExpress, but you'd have to figure out how to output to them.

Re: A Canvas Made of Pixels

#87

Post by asadlionpk »

benbenolson wrote: post #36

He says in the article that "Apple did a good job with their monitor", but what he fails to realize is that the panel in that monitor is made by Samsung, and is used in numerous other monitors, such as a bunch of Dell Ultrasharp monitors. These are the exact same monitor, except with a different frame and stand, and are available for a fraction of the cost.

Assuming some alternate monitor is equally good with colors and contrast/backlight. A simple raspberry pi should be able to do the rest of the computation needed for this.

Re: A Canvas Made of Pixels

#89

Post by tomek_zemla »

anarchitect wrote: post #35

Nicely done, though I would have loved to have seen some build pictures. There are a number of commercial players in this market (for example https://frm.fm/ ) which combine hardware and marketplace, and the geek in me would love to see these succeed. I work in e-commerce selling art reproductions and have thought a lot about this. I believe as soon as you make the art ephemeral or changeable, its value (to you, rath…

Electric Objects is another one trying to get people to convert from physical to digital art on the wall. I believe them and Framed are priced at around $499... https://www.electricobjects.com/

Re: A Canvas Made of Pixels

#90

Post by roywiggins »

chrismbarr wrote: post #12

I'm really surprised there's no photos of the build process. It's hard to tell if this is actually what is being described, or just a blog post around a photo of a framed image.

There's a video further down demonstrating it adjusting to different lighting conditions; you can see a slight lag.
Post reply on HN