f-number equivalent between m43 and FF

Started Mar 25, 2014 | Discussions thread
Jack Hogan Veteran Member • Posts: 6,053
Re: SNAP! Where it is?

bobn2 wrote:

Jack Hogan wrote:

crames wrote:  This illustrates how upsampling does not increase noise, (except if done badly), and certainly no new photon noise since this is all happening well-past the point where we are dealing with photons.

I would tend to agree. The question is how do we work the fact that one image is pixelated and the other one is not in our equivalence discussion? Perhaps we cannot. Perhaps our IQ parameters allow us to only compare 'equivalent' images captured at the same resolution or at some downsampled common denominator - but not after upsampling.

In the end the argument depends on the idea that noise is bandwidth dependent, and the bandwidth limit is determined by the viewer.

Right.  And/but we are not used to taking viewer bandwidth limits into consideration in our 'equivalent' comparisons.  Should we?  Can we?

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