|
|
 January 23, 2012, 01:01:55 PM
|
Super Member
Posts: 2355
Germany
|
how comes that some successive Zapruder frames show differences regarding the sharpness, here are some examples.    Z229 lacks the sharpness (if that is the correct term) of Z228 and Z230. Even non film data, such as the dirt marks lack the sharpness of the other frames. Is MPI to blame for this when they scanned and digitized the frames or what is the explanation for this obvious discrepancy ? I am not implying anything with this, I just want to know how this can be explained. here one more example:    composite: 
-------------------------
-------------------------
"ich bin ein Berliner" As a guest, you are not allowed to view links.
Register or Login"There's none so blind as those who will not see."
|
|
|
 Reply |
|
|
|
|
January 23, 2012, 02:36:57 PM
|
Super Member
Posts: 2633
|
Gerda I was thinking the same thing over the last two days as i was adjusting the color on these MPI FRAMES. I would get one SHARP frame, followed by one SOFT FOCUS frame, followed by another SHARPE frame. MPI Medium Zoomed frames ( color adjusted ) new gallery As a guest, you are not allowed to view links.
Register or Login  
-------------------------
|
|
|
« Last Edit: January 23, 2012, 02:44:00 PM by Robin Unger »
|
|
|
|
Reply |
|
|
|
|
|
|
|
January 24, 2012, 11:34:36 AM
|
Super Member
Posts: 2338
|
Yes it is a good question.
We'd have to know more information before trying to answer. The scans are from what generation copy? Is the dirt on the film that was scanned, or was it copied on to this film, from the version copied?
Then we'd have to ask about the frame scans. Are they all done the same way, in terms of enhancements done to each frame? Or are they done frame-specific?
Then they convert them for web viewing.
One possibility is the repeated opening and then "save as" in an editor. If you repeatedly save an image in a compressed file type, such as jpg, it will compress each time you save it. This will quickly begin to blur the image. It would be compounded by a tiny image, without a lot of detail to begin with, like an 8mm film.
-------------------------
-------------------------
"you're the cop, you figure it out"
-Lee H. Oswald to Dallas Police detectives, weekend
of 11-22-63.
"Part of the reason why we avoided talking about this thing, because every time you say something, somebody misinterprets what you say."
-James. J. Humes, excerpt of ARRB statement, 2-13-96
|
|
|
Reply |
|
|
|
|
|
|
|
|
|
|
January 28, 2012, 12:18:32 PM
|
Super Member
Posts: 2355
Germany
|
Too many hands on the original over the years. Sounds like maybe the storage methods used by Life really weren't all that great in the long run.
that does explain the scratches, dirt etc. Do you think that has also an effect on the focus/sharpness of some frames ? To me it appears as if some guy in the chain of restoration/transfer did not pull the focus propperly. You have also the artifacts that vary in sharpness. I mean the whole transfer was not really done very accurate. They left out frames, misalign some and what not.
-------------------------
|
|
|
Reply |
|
|
|
|
|
|
|
|
|
|
January 28, 2012, 06:17:07 PM
|
Newbie
Posts: 2
|
I believe the difference in sharpness is due to motion blur as the camera and limo are both in motion
-------------------------
|
|
|
Reply |
|
|
|
|
January 31, 2012, 11:59:31 AM
|
Sr. Member
Posts: 264
|
I had a bauer 8mm camera and sometimes the film was not correctly pressed on tha film holder, but some frames here have even no grain, the grain disseapear.
I think the film was treated, enhanced and some wavelett settings were not the same everywhere.
I explain this ; i am treating every Zapruder frame and i cannot do it the same day. The enhancements settings are stored, but on 500 frames, there is a possibility
that something is wrong with one frame. That's the only explanation i can find on this 228 soft focus, grain should be visible.
-------------------------
|
|
|
Reply |
|
|
|
|
January 31, 2012, 12:42:26 PM
|
Super Member
Posts: 2355
Germany
|
I had a bauer 8mm camera and sometimes the film was not correctly pressed on tha film holder, but some frames here have even no grain, the grain disseapear.
I think the film was treated, enhanced and some wavelett settings were not the same everywhere.
I explain this ; i am treating every Zapruder frame and i cannot do it the same day. The enhancements settings are stored, but on 500 frames, there is a possibility
that something is wrong with one frame. That's the only explanation i can find on this 228 soft focus, grain should be visible.
Thierry, That is a good expression and fits what I see, "the loss of grain" in those frames. In some of the frames, in all 4 versions that come with the MPI dvd, you can also see a moire effect, not just in the soft focus frames but also in the "good" frames. Has anybody noticed this "moire" effect and can explain this ?
-------------------------
|
|
|
Reply |
|
|
| 0 Members and 1 Guest are viewing this topic.
|
