Roger N. Clark (change username to rnclark) wrote:

jeff miller wrote:

This thread is providing some very useful information about SNR of
media and human eyes... keep it coming!


See:
Notes on the Resolution of the Human Eye
How many megapixels equivalent does the eye have?
The Sensitivity of the Human Eye (ISO Equivalent)
The Dynamic Range of the Eye
The Focal Length of the Eye:
http://www.clarkvision.com/imagedeta...esolution.html

Contrast thresholds data:
http://www.clarkvision.com/visastro/omva1/index.html

Roger


Great resource. Based on that data, I'd conclude that images captured
from my microscope might benefit for 65K x 65K resolution, so I'll use
16 bit D/A's to drive my scanning coils. Of course that kind or
resolution can only be rendered in print. And represents an 8GB file
size. And will take 2 hours to collect.... but might as well build it in.

The figure of 10,000:1 dynamic range in any "one view" corresponds to
about 12 bits. That's pretty much exactly the nominal dynamic range I've
heard quoted for the front end of an SEM.

But it might seems no current reproduction technology acheives quite that.

-Jeff