4K Orson Welles , Citizen Kane Scan and MTF , ESF and LSF Analysis

[Mustafa Umut Sarac]

Hello all, I tried to learn something usable from orson welles citizen kane and conducted a short quick mtf software analysis. I stumbled in to a result which I could not understand anything. Can you help me to get it right ?

Analysis done on black chair white notebook corner.

Thank you ,

Mustafa Umut Sarac
Istanbul

[Bernard_L]

Well, if you stated "I did A, B, C, and at this point I do not understand the relation between C and D", maybe someone could help. But

I stumbled in to a result which I could not understand anything.

is kind of difficult to comment upon.
Just a few remarks:
- The "T" in MTF is for Transfer. So you must analyze the output with a known input. MTF analysis is normally not done with "natural" image as you do. Normally with a perfect sharp black-white edge, even better if slanted.
- What is the system or process the MTF of which you are trying to measure?
- Seeing how your MTF graph drops to zero (close) at 0.2 (0.2 what?? presumably cycles/pixel) it looks like the image "wallpaper" has been blown up (oversampled) from a low-res image.
I stop here and will not write up a tutorial on the MTF. Many such documents can be found online.