Counting Pixels in the Zapruder film.

[Drew Phipps]

Here is a quick summary of the bystanders and their apparent speed in pixels per frame:

Brehm's kid 14 frames* avg speed 39 pixels/frame
Brehm 18 frames* avg speed 37 pixels/frame
Jean Hill 22 frames avg speed 37 pixels/frame
Moorman 22 frames avg speed 35 pixels/frame
Toni Foster 27 frames avg speed 32 pixels/frame (walking a bit to the right)
White blur 23 frames avg speed 30 pixels/frame
Running Man 17 frames** avg speed 33 pixels/frame (running a bit to the right)
Bothun 13 frames** avg speed 31 pixels/frame
Altgens 6 frames** avg speed 31 pixels/frame

*Brehm, and his kid, start in the middle of the image at Frame 277.
**Running Man, Bothun, and Altgens are still in image when the limo reference point moves offscreen at Frame 344

Individual frame anomalies:

In the following frames I noticed anomalous relative movement of bystanders.

Frame 282: Brehm has moved left 25% more than his average speed. Brehm's kid does not display this unusually fast motion.

Frame 283: Brehm has only moved left at 50% his average speed. Brehm's kid has also only moved left at 50% his ordinary speed.

Frame 296: Hill has moved 45% faster to the left than her average speed. Moorman has moved 51% faster to the left than her normal speed.

Frame 304: Toni Foster has moved "up" 15 pixels. Hill and Moorman do not exhibit this unusual movement.

Frame 308: a) Hill moves "up" (relative to the limo) 19 pixels. Mary Moorman does not move up. Toni Foster does not move up.
(Hill also moved up 10 pixels in Frame 307. She could be rising up on her toes, if that can be accomplished in (2 / 18.3) sec. If so, she passes out of frame without settling back down.)

b) Toni Foster has moved to the left only half her average speed. Hill and Moorman do not exhibit this unusual movement

Frame 312: Toni Foster moves left 65% faster than average. Nothing to compare Foster motion with.

Frame 313: Toni Foster moves left 45% faster than average. White blur appears. Nothing to compare Foster motion with.

Frame 324: a) White blur moves left only 20% of its normal speed.

b) Toni Foster appears to move RIGHT with respect to the limousine.
(This could be a result of some sort of image displacement in the "sprocket area," which contains other displaced images as well)

Frame 325: White blur moves left 50% faster than its normal speed. No background objects to compare.
(Could be a darting dragonfly or some other large bug with iridescent wings, explaining shape anomalies, but dragonflies are rare in Texas in November)

Frame 331: White blur moves left only 50% of its usual speed. Running Man and Bothun do not exhibit unusual motion.

Frame 333: All three background objects (white blur, Running Man, and Bothun) drop down more than 30 pixels with respect to the limo.
(Zapruder could have lowered the camera to produce this effect, but it seems unlikely that he could do this without any effect showing up in Frame 332 or Frame 334, which means he began and completed a significant physical movement of the camera in 1 / 18.3 sec., and without a lot of extra blurring)

Frame 342: Running Man drops down 21 pixels with respect to the limousine. Bothun does not drop down anywhere near that amount. Altgens does not drop down anywhere near that amount.

(continued)