Joofa

Not all schemes use voltage amplitude. For e.g., FSK and PSK . But, they are still analog signals though, carrying digital interpretation.

Only in certain cases. One can find various scenarios (even for Poissonian sources) where one obtains results different from Shannon-Hartley. It all depends upon various states of signal vis-a-vis ...

Shannon's theorem is a special case in a more general analysis of of information capacity associated with a photon channel. There are a number of interesting results. Only in certain cases the ...

The information rate at the quantum level is twice as large as that at the classical limit (of Shannon). But, the degrees of freedom in the classical theory are twice than for the quantum limit. ...

I think that thing that offended you was in a message to a senior math prof, who can certainly understand these things. My advise to you is to not interject yourself in discussions that don't ...

[SNIP on that MTF thingy ...] Yes, what is the MTF of this image? What is the MTF of a natural image? BTW, can MTF solve world hunger, find cancer cure, and space trip to the nearest star? ...

The blur kernel also represents the pdf of position of a photon in an image plane. With this understanding, the second moment measures "average spread", and using usual calculation yields infinite ...

Ha. I'm actually a relatively younger guy. You might be surprised. Don't put me in the category of Bobn2. :-) University libraries, my friend. What are they for? Papers in optics, even covered in ...

You are not. At all. Period. It would really be undermining the real experts in the imaging world if you are considered an 'expert'. Especially in theory. As I said before, not surprising for me ...

Well, you have never heard of many things before, and I had to educate you in the past. Yes. But, I shall let you look into your 'few thousand pages of textbooks' first. I'm not surprised. Whats ...

IMHO, Microcontrast is not a property of an optical system. MTF is a property of an optical system, for e.g. Microcontrast, whatever that is, is a property of an image - imaged object that is. MTF ...

Yes, it seems so. Many of the stuff thrown around in this thread such as MTF50, MTFxx, or tools such as MTFMapper, or even ImaTest, are not designed to work with natural images, in the way as asked ...

The curvature of log likelihood function is well-known in statistics, signal processing, and estimation theory as determining the "sharpness" of a function. On a quick glance the BxU just appears ...

You forgot to say 'please'.

Yes, I know. But, that hasn't much to do with the issue at hand. The white blob is not a single point.

Sorry, you have little idea what you are talking about. I didn't even mention a single location of (0,0). And, if you just restrict to that location, you don't even have a natural image as that ...

Listen I can't argue this point with you. This is so established in image processing world that people know it. I guess, you are the one not in the 'know'. [SNIP of stuff that I'm getting tired of ...

There are a number of ways of doing that. Lets do a back of envelope calculation, which is still otherwise even consistent with typical power spectrum measurements of natural images as done here. U ...

Oh, you are in a class of your own, Bob. :-) Tons of data - of course your message here. Master of obfuscation and stating the obvious in such a convoluted manner that you have generated a healthy ...

It is a general property of natural images. Yes, such an image would have more energy in the higher frequency regime than say an image of vegetation. However, typically it would still have more ...