headshot head movements

[John Dolva]

edit: Considering some of the points raised in this thread, I've incorporated them into this short movie.

There is blur. It is possible to isolate those areas within a blurred portion which would be constant whichever way the blurring went. Within this constant area it's possible to identify features in order to locate the body.

Here I've aligned these 'blur corrected' (needs checking/confirming) frames so that the relative movements of JFK and Jackie can be studied. The blur seen here emphasised, are the areas to avoid for firm conclusions.

The result as I see it is

a scissoring of jackies upper arms as if she was using a pair of garden shears and was just sarting the cutting movement. At the same time her head moves down and to the left. Or does it?

The sum of these movements (Jackies) can be easily explained by picturing her arms extending to follow where they were 'attached' to Kennedys body and her torso tilting to follow the arms. Thus the apparent down of her head is a tilt directly towards Zapruder. This tells us the direction Kennedys torso moved as a result of the head shot.

Kennedys head meanwhile has been in a more or less constant position for some time.

The instant captured by the Zapruder frame 313 is after he has been shot, and a number of frames after the gun was fired.

The head is tied down by various tissues to the top of the spinal column. It's along this that the head pivots.

What I see here is a drastic change in head pose. Quite different I undrerstand from the 'accepted' (if there is such a thing) interpretation.

The head turns, presenting more of the back of the head towards Zapruder. It also lilts back towards Zapruder, presenting more of the top of the head.

It's hard for me to picture the type of force and it's direction that would cause this movement.

A body tilt to the right, 90 degrees off the direction of the 'sixth floor' sniper. After having been struck on the right side of the head, and already tilting to the left? The Magic Jat Effect???

At the same time a right head snap, counterclockwise twist.

The only way I can picture in a way that bears a resemblance to the autopsy material, is a heavy tangential strike right above the pivot point of the spinal column projected up to the skull, this would be roughly centre top. And this came roughly in a direction in front of Zapruder and to the left of the limousine.

And in terms of kennedys head it would be from the front left quadrant.

movie best viewed in continuous loop at full screen in order to go over all the areas visible and to step back and get overall view.

Edited April 17, 2006 by John Dolva

[John Dolva]

The above post has the alignment so that the relative movements in the n/s is emphasised.

One needs to also consider the other factors of rotation that Bill has mentioned. An alignment where the far (left) edge of the limousine is aligned to keep it focused is difficult because of the blur and an interpretation is necessary largely on the basis of brightest areas and up down lines that shift as per rotation described.

So the increased forward movement is partly an interpretation. There is some and it may be significant.

________

in the meantime here is a clip giving a broader view of something like what it may have looked like at the time.

For study purposes the frames have a transparency here so that the distance travelled frame by frame can be compared for speed shift analysis. Also note the drift from the kerb.

[John Dolva]

A superb media player from an open source worthy of support.

media player classic

http://sourceforge.net/project/showfiles.php?group_id=82303

it's good for floating on top of windows in small format without borders or toolpanels (right click menu.) while viewing the above two clips and checking the descriptions. A double click flips from full screen to thumbnail.

Edited April 17, 2006 by John Dolva

[Bill Miller]

John - this is what I came up with so far in bringing Z312 over the top of Z313. I watch the area of his hairline near his neck in the back and I am having trouble seeing any real change, thus not seeing his head turn other than the slight rotation of the limo between frames. However, can you see the avulsion of the bones to the right back side of his head? The back side of the head was shaded away from the sun, but where the bones opened upward - they become illuminated, thus allowing the sun to separate them from the rest of the back of the head in shadow. While this will be hard for some to see and rightly so because of the camera film speed that the incident was captured at - it does seem to add support to what the Parkland doctors said about the bones on the right back of the head being sprung open.

Bill

Edited April 17, 2006 by Bill Miller

[John Dolva]

John - this is what I came up with so far in bringing Z312 over the top of Z313. I watch the area of his hairline near his neck in the back and I am having trouble seeing any real change, thus not seeing his head turn other than the slight rotation of the limo between frames. However, can you see the avulsion of the bones to the right back side of his head? The back side of the head was shaded away from the sun, but where the bones opened upward - they become illuminated, thus allowing the sun to separate them from the rest of the back of the head in shadow. While this will be hard for some to see and rightly so because of the camera film speed that the incident was captured at - it does seem to add support to what the Parkland doctors said about the bones on the right back of the head being sprung open.

Bill

Bill, I see we have ended up aligning the frames in very much the same way. So a comparison is possible for this one. Except the frame before 313 that I've used has concerned me for a time as I can't say for sure if the one Ive got hold of(cropped) is 312 or 311. This makes it possible for me to check. I'll do so and redo film if necessary.

(What could help a lot would be if you could elmail me the best 312 and 313 you have so we are working on exactly the same set?)

__________

I've been trying to isolate headwound from blood mist, and yes, I see the wound as you say. However, a determination of exact head pose at this point seems to me to be crucial. I'll post on why I choose to see the head as I have described. Suffice to say for now is that I think it is possible to see no disparity between the autopsy photos and what the frame shows here.

(Maybe I've just gotten used to seeing it that way, but I definitely can see the head snapping to the right and twisting to the anti clockwise.)

Edited April 18, 2006 by John Dolva

[Bill Miller]

I've been trying to isolate headwound from blood mist, and yes, I see the wound as you say. However, a determination of exact head pose at this point seems to me to be crucial. I'll post on why I choose to see the head as I have described. Suffice to say for now is that I think it is possible to see no disparity between the autopsy photos and what the frame shows here.

(Maybe I've just gotten used to seeing it that way, but I definitely can see the head snapping to the right and twisting to the anti clockwise.)

John, invert the frames which may allow you to see the mist pattern better.

Email me at Imsjle@aol.com and I will send you the frames I used. I will also have better ones soon once I find a disc I have misplaced. A computer crash caused me to lose the ones I had on my hard drive.

Bill

[John Dolva]

Not meaning to distract from the main thread.

An aid to understanding forces contributing to movement in the limousine.

Legend:

This is lines showing the orientation of the crossbar thus giving indication of which way the limo was pointing.

I've grouped the lines according to common orientations. Some lines indicate a smooth transition indicating a uniform direction. Some lines vary wildly frame to frame indicating direction changes. Some lines are parallel, inidcating a continuous direction change in an arc around zapruder..

The pink dots indicate the points of change.

The lines below are an indication of speed changes. Because of blur in some frames. (this is the wide lines) I've simply choosen the leading edge as a reference. I know this to be incorrect as a whole, but disregarding the heavily blurred frames one can at least get some info there, and the image logs the current thinking so it needs development.

________

What is of particular interest is the major direction change immediately after 313 and the settling down into a longer right curve. The white lines are based on the first frame and a suggestion of how the 314 crossbar should have been oriented if there had been no direction change.

this sort of drastic shange and its effect can be experienced and seen by putting a heavy round object on the back bench in a car and driving along and jiggling the wheel.

As the limo is front steer and the pivot is above the rear axle, in other words behind Kennedy, a sharp right turn such as this would shift the seat under him to his right. This shift occured after this frame, perhaps as the frame was exposed. Exactly what effect this would have on occupants I haven't thought through, but here is the results as of now.

_________________

Bill, thank you. I'll email.

[John Dolva]

through various edge detection, saturation and color separation.

an offer for study re headshot.

The attempt was to see exactly what position/s his head was recorded as being in in zf313.

It helps but clouds in other ways.

What's of interest is the apparent center of one explosion at the top of the head. At which point after the bullet struck the skull may be possible to say using some preexisting formuale.

The bullet would have struck and caused fractures and caused an initial hole in the skin.

Then it probably fragmented and various fragments went different ways.

Whether a fragment travelled in line with the bullets trajectory or not, the force imparted,absorbed would. So a fracture extending across the skull could blow out without having to be hit by a bullet fragment.

This initial strike would cause an explosive cavitation. This is what is responsible for the tearing open of the scalp and the dislodging of the fragmented skull bone, and the avenue for the largescale dispersal of blood/brain.

(I know at this point my understanding must be taken with a grain of salt more than usual as I know someone like Sherry is the one to refer to. She sees far more subtlety in the blood spatter. I'm still studying her work to better understand.)

The way I see it is that this explosion must have taken place before this instant in order for it to progress to the point its recorded like this.

Bactracking we have frame 312. Where is the bullet at this point? 10 meters away? 50 meters? or 0.05 mm from the surface of the skull?

Edited April 18, 2006 by John Dolva

[John Dolva]

a quick update

[Bill Miller]

John,

If JFK's head turned to his left upon being shot ... would one not expect the amount of visible hair width on his neck to grow larger as the head rotated away from the camera ........ and would not also his protruding chin in profile in Z312 disappear if the President turned away from the camera?

While the hairline does blur ... it looks to narrow - the chin in your animated movie remains in profile which would tell me that no twisting of the head occurred ... if an ything it may have twisted to the right - would you not agree when these points are considered or am I missing something?

Bill

Edited April 19, 2006 by Bill Miller

[John Dolva]

Bill

Well, yes. from my perspective you are missing something (which of course doesn't mean you ARE missing something.It may very well be that it is me that is missing something. I don't need to convince of anything, but am stating as I see it in the hope to get the sort of comments as you supply, hopefully to arrive at an ultimately correct understanding.)

I don't consider that is the chin, because: a close look at the movie in that area indicates to me that this is the shadow of the head extending over the shirt cuff or Jackies hand (white gloves??).

I see the head pose at its extreem as per this diagram.

The blur extends the more illuminated portions such as the ear extremity into a 'limo direction of travel' smear which seems to me (combined with the increased luminance from the reflections in the mist) to give an appearance of hairline in a way that doesn't corresopond with the actual hairline. These areas need to be more closely looked at perhaps at increased gamma.

Likewise the edge of the arm/coat is smeared. Also the back edge of the head. Some of these would be motion blurs of the individual parts moving fast, others and in combination would be motion blur of the limo and others and in combination camera motion

What I find most useful with this sort of trsansition animation is it allows one to track various head features and see where they end up in the next frame. It's doing this at full screen scanning the various parts while trying to picture the parts not so clear that I come up with this particular movement.

EDIT:: ps: the white dot and the lines hopefully indicate spine location and the white dot as the top of the spine where it enters the cranium. This is a primary pivot point.

Edited April 19, 2006 by John Dolva

[Bill Miller]

"I don't consider that is the chin, because: a close look at the movie in that area indicates to me that this is the shadow of the head extending over the shirt cuff or Jackies hand (white gloves??)."

Well, John ... lets get that myth out of the way right off for the sun was in the southwest shining from Jackie to JFK. That makes it impossible for JFK to cast a shadow onto Jackie.

Bill

SHADOWS CAST AT THE TIME OF THE ASSASSINATION

[John Dolva]

Bill, wrong myth I suggest. If (and it makes no difference to this in essence whether it does or not) Jackies left hand (her left ) is resting on JFK's right arm/wrist/hand then I suppose what is white about where his right wrist is, his head certainly can shade. However whatever the white area is, JFK shirtcuff or Jackies hand, the shadow from the head moves over to cover this in part. (IMO)

[Bill Miller]

Bill, wrong myth I suggest. If (and it makes no difference to this in essence whether it does or not) Jackies left hand (her left ) is resting on JFK's right arm/wrist/hand then I suppose what is white about where his right wrist is, his head certainly can shade. However whatever the white area is, JFK shirtcuff or Jackies hand, the shadow from the head moves over to cover this in part. (IMO)

Altgens photo gives us a frontal view and Jackie's hands are no where near JFK's head.

Bill

[John Dolva]

OK, I agree! No argument, her hand is not there.

So, is it shadow or is it chin? I say shadow on a white area which may be JFK's shirt cuff. But even if it is shown to be a whatever, what you are saying is chin, I say is shadow cast by head on this whatever.

(this clip is basis for what I'm saying. above posts explain.

http://educationforum.ipbhost.com/index.ph...pe=post&id=5375 )

Edited April 19, 2006 by John Dolva