advice on phosphorimager purchase
krasel at alf.biochem.mpg.de
Mon Dec 5 08:08:26 EST 1994
John Brunstein (brunstei at UNIXG.UBC.CA) wrote:
> I beg to differ...16 bit D/A conversion DOES NOT in any way
> affect the image resolution as compared to 8 or 10 bit, as seems to be
> implied in some of the previous posts. What it does is split the recorded
> signal intensities into ~16384 'steps' while an 8-bit machine takes the
> same range of signal intensities and splits it into 256 'steps'. This
> has no discernable effect on image quality.
Does 16 bit D/A conversion not produce a picture with 2^16 grayshades
whereas an 8 bit D/A conversion will produce a picture with only 2^8
grayshades? More grayshades result in better image quality (_not_
resolution!): you can see the "steps" between two shades of gray with
2^8 grayshades, but you can't with 2^16 grayshades.
Or am I completely off here?
/* Cornelius Krasel, Abt. Lohse, Genzentrum, D-82152 Martinsried, Germany */
/* email: krasel at alf.biochem.mpg.de fax: +49 89 8578 3795 */
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