On 12.04.2010, at 14:34, Sebastian Haase wrote:
My point was also, that I would doubt that there is physically(!) more
information than 16e6 possible values per pixel.
A digital gray scale CCD camera with more than 12 bits costs multiple
1000s of Euros or Dollars...

Every current DSLR camera has more than 8bits per color, a Canon EOS 450D has 14bit for example. While a human eye might not see any difference with more than 8bits, you can use the information when manipulating the image (e.g. change the exposure/brightness).

Regards,
Oliver
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