by Qev » Wed Aug 16, 2006 6:03 pm
In a lot of cases, false-colour images are used because the original images were taken using frequencies that we simply are unable to see. The original images are taken through narrowband filters, and would simply look like black-and-white photographs.
In other cases, the frequencies they're imaging are visible to us, but they chose false colours in order to bring out certain details that they're interested in. But unless they gathered enough data on enough different frequencies of light, they could only really reconstruct an approximation of true colour, since they'd be missing too much information.
In a lot of cases, false-colour images are used because the original images were taken using frequencies that we simply are unable to see. The original images are taken through narrowband filters, and would simply look like black-and-white photographs.
In other cases, the frequencies they're imaging are visible to us, but they chose false colours in order to bring out certain details that they're interested in. But unless they gathered enough data on enough different frequencies of light, they could only really reconstruct an approximation of true colour, since they'd be missing too much information.