Re: The problem with Pulfrich

[P3D Gregory J. Wageman <gjw@xxxxxxxxxx>]

>Gregory J. Wageman asks:
>
>Which is the appropriate eye?  Leading or trailing?  My guess is you'd
>want to delay the signal to the trailing eye...

Larry Berlin responds:

>That depends on what is moving and whether it should be in front or in back.
>If the subject is moving relative to the background and you want the subject
>in front, place the lens over the leading eye. If the background is in
>motion, you need the lens over the trailing eye so that it will appear in back. 
Hmm, let's try that again.

If the camera is trucking left (so that objects appear to be moving to the
right, but at different relative speeds), over which eye should I hold the
filter for non-psedo stereo?  [Purists please note correct use of the word
"filter" in place of the techically incorrect term "lens", since a
non-prescription sunglass "lens" does not bend light; at least not
intentionally.  What do I win? (-; ]

Based on the fact that in a static scene, the left eye puts objects in
front more to the right WRT the background, then I surmise one should be
delaying the image to the left eye, so that objects in front are farther
to the right than when the right eye sees them (for the same trucking-left
shot).  So, contrary to my first instinct, it sounds like the leading eye:
left eye for trucking left; right eye for trucking right.  Is that correct?

>Try it at your computer with the mouse pointer.

Good suggestion!  I will give this a go...

        Keep on trucking :-),
        -Greg


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