Film vs digital. I wouldn't have known that if he hadn't clarified what
he meant with: "... image-based sensors rely on photo-sensitive chemical
reactions."
Chuck Norcutt
On 9/22/2015 2:33 PM, ChrisB wrote:
Thanks, Chuck. I did study physics, but I must have missed the
lessons on digital sensors;-)
But what is the difference between digital and image sensors, in this
context?
Chris
On 22 Sep 2015, at 15:06, Chuck
Norcutt<chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
Did you not study physics? Does this paper help?
<http://people.csail.mit.edu/hasinoff/pubs/hasinoff-photon-2012-preprint.pdf>
From the first page of the paper: Image sensors measure scene
irradiance by*counting* the number of discrete photons incident
on the sensor over a given time interval. In digital sensors, the
photoelectric eff ect is used to convert photons into electrons,
whereas image-based sensors rely on photo-sensitive chemical
reactions. In both cases, the independence of random individual
photon arrivals leads to photon noise, a signal- dependent form
of uncertainty that is a property of the underlying signal
itself.
My emphasis on*counting* Chuck Norcutt
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