Don, Thanks for the reference, I'll have to look for some of the articles. Land and Polaroid did some interesting stuff with color perception. Regards, Bob S.
[EMAIL PROTECTED] writes: > Long ago, when he was working on the development of colour film, Land did an > interesting experiment. He took two pictures of the same scene with B&W > film, one through a green filter and one through red. The pictures were then > projected on a screen from two different projectors: one with a green filter > and one with a red filter over the lens. The result was a full colour image. > > In 1963 I found a description of this experiment in Scientific American and > did the experiment myself. Sure enough it worked. How and why? I don't > remember the details, or the explanation, but it had much to do with the > human eye and brain and less to do with the wavelength of the light > involved. I'm going to try the same experiment, but instead of projectors > I'm going to try to do something on my screen with Photoshop and layers. It > may not be possible, but will give me something to mess with between now and > when things get back to normal in a week or so. > > The most interesting thing about the whole experiment is that there were > shades of blue in the images. I'm going to pick up some B&W film for my P30, > before the shops shut, and have a go at this over the holidays. > > Don
