Results 1 to 2 of 2

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

  1. #1

    Join Date
    Jul 2008
    Location
    Istanbul - Türkiye
    Posts
    55

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

    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 ?Click image for larger version. 

Name:	citizen-kane-wallpaper-for-mobile-4k-hd-2020.jpg 
Views:	26 
Size:	14.9 KB 
ID:	225932Click image for larger version. 

Name:	kane 2.jpg 
Views:	19 
Size:	36.3 KB 
ID:	225933Click image for larger version. 

Name:	kane1.jpg 
Views:	15 
Size:	38.7 KB 
ID:	225934

    Analysis done on black chair white notebook corner.

    Thank you ,

    Mustafa Umut Sarac
    Istanbul

  2. #2

    Join Date
    Jun 2013
    Posts
    157

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

    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.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •