Chris Peterson wrote:You can see exactly this with your own eyes when the conditions are right, and it will look very similar to what the image shows.
Such a good news! I hope i will have the opportunity to see a halo like that one day!
Do you know if there are places on Earth, where we would be more likely to admire a halo, compared with other places?
Some people get very upset at the idea of composite digital images. But the reality is, our eyes have orders of magnitude wider dynamic range than the best cameras.You can stand in sunlight and clearly see detail in both the brightest and the most shadowed areas- something that no camera can do. (In reality, there is more than your eyes involved here- your brain actually builds up an image as your eyes move around. Yes! What you see with your own eyes is also a composite, both of exposure and a mosaic.)
I didn't know what we see is a composite, this is very interesting. I hope researchers will be able to make artificial eyes, which would enable blind people to recover the vision, then to see as well as people with biological eyes, soon. Some researchers have already made artificial eyes, by connecting the eye to the brains, so indeed, it is linked to the brains... so it might be very complicated.
It is possible to make an image that comes closer to visual reality by taking several exposures and combining them cleverly. Tools for doing this are routinely available in image processing software, and some cameras now take two or more images in quick succession and silently combine them into a single image before you ever see it.
Yes, my camera can do that by night! If i can put my camera on the ground, or on a wall, a table, etc. the images are very beautiful. Unfortunately, if i take pictures while taking my camera with my hands, the images are blurred, even if i try not to move at all. When light is week, at night, is light, the longer it is to take a picture, the harder it results not to move at all.
I don't know if this image is such a composite, but I do know that this type of shot usually produces a more realistic image when composited from multiple exposures, and I also know that the image quite accurately represents the true visual appearance of a halo display.
Thank you a lot
PS: picture 1 from http://www.boingboing.net/200811120918.jpg
picture 2 from http://www.doctissimo.fr/html/sante/mag ... ficiel.htm
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