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Oh, I hoped to see something based on Fechner colours ( https://en.m.wikipedia.org/wiki/Fechner_color ). It gave me quite some creeps when a misconfigured XFree86 server managed to draw a bright red line right across the black and white LCD screen of my first laptop...
EDIT: warning! strobing!
https://en.m.wikipedia.org/wiki/Benham%27s_top#/media/File%3...
Very neat, the outcome probably isn't what you were hoping for, but it has a beautiful and ethereal quality to it. It's like an art piece. From the photos and video, only a small section of the screen has colour. Does that change as you move around, or is the coloured section static? Off topic, but the visual effect seen here is a lot like how my memories and dreams feel; only the thing I'm currently focussing on has…
How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with video too?
Can someone explains how this works? I have frustratingly been googling for 30 minutes now trying to learn how autochrome works. Being tech oriented it's so frustrating when people sum it up in 1 sentence "its made of potato starch and magically it makes color!" How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with…
The starch grains were randomly scattered on one side of the photographic plate, and acted as filters so that small portions of the plate would capture certain colors. The plate was then developed as a positive image.
When you would shine light through the developed plate it would go through the starch grains (still on the plate) as well as the developed image. The developed image controls the luminosity while the colored starch grains again act as a filter and control the hue of the transmitted light, roughly reproducing the original scene.
Can someone explains how this works? I have frustratingly been googling for 30 minutes now trying to learn how autochrome works. Being tech oriented it's so frustrating when people sum it up in 1 sentence "its made of potato starch and magically it makes color!" How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with…
Can someone explains how this works? I have frustratingly been googling for 30 minutes now trying to learn how autochrome works. Being tech oriented it's so frustrating when people sum it up in 1 sentence "its made of potato starch and magically it makes color!" How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with…
Autochrome was an early technique for color photography. Wikipedia has a pretty good explanation [1]. The starch grains were randomly scattered on one side of the photographic plate, and acted as filters so that small portions of the plate would capture certain colors. The plate was then developed as a positive image. When you would shine light through the developed plate it would go through the starch grains (still…
This part is key to understanding. The plate with the starch-based colored mosaic is not simply a filter used upon capture to be removed after (as most filters are today), but also a filter to be used upon viewing. Since the same exact “filter” is used for both capturing and viewing of a given photograph, it allows the mosaic to be random, simplifying creation of the filter.
Can someone explains how this works? I have frustratingly been googling for 30 minutes now trying to learn how autochrome works. Being tech oriented it's so frustrating when people sum it up in 1 sentence "its made of potato starch and magically it makes color!" How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with…
Imagine that each grain is blocking a 'pixel' of the negative. For simplicity of this explanation, I'll pretend the grains are red, green, and blue. If there's a blue grain, only blue light can get through, and thus the luminance is baked in specific to the amount of blue in that region. The same is true for the red, and the green.
Thus, each 'pixel' of the negative isn't determining a monochromatic luminosity (ie black and white), but instead telling the luminosity of a single channel of red, green, or blue.
When the grain filter and the developed negative are combined, we get natural colour. The same filter is used for generation and display.
Another way to think of it is like this: Each pixel on our screen is actually 3 subpixels, each defining red, green, and blue, and we format our image to alternate between telling the red, green, and blue channels how bright to be. This is doing the same, but the subpixels are distributed randomly because that's much easier to make.
EDIT:
If you organise the grains in a geometric pattern, you get Dufaycolor[1].
Can someone explains how this works? I have frustratingly been googling for 30 minutes now trying to learn how autochrome works. Being tech oriented it's so frustrating when people sum it up in 1 sentence "its made of potato starch and magically it makes color!" How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with…
Very neat, the outcome probably isn't what you were hoping for, but it has a beautiful and ethereal quality to it. It's like an art piece. From the photos and video, only a small section of the screen has colour. Does that change as you move around, or is the coloured section static? Off topic, but the visual effect seen here is a lot like how my memories and dreams feel; only the thing I'm currently focussing on has…
Yeah I would like to improve the effect. I think the main colour region seems to stay the same. I'm wondering if I can get acetate that's ever so slightly adhesive, so it sticks better to the monitor, which I'm wondering might help the colours show better all over.
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