Re: Stereo Window -Window to the World

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Sun, 22 Jun 1997
>From: P3D Bill C Walton comments:
>
>P3D Paul Talbot asked me to explain stereo 
>window reversal..........
>When the stereo window is correct there is more subject 
>matter shown on the inner edge of the right image than 
>there is on the outer edge of the left image........
>
>When the stereo window is reversed there is more subject 
>matter shown on the outer edge of the left image than there 
>is on the inner edge of the right image and .......

******  Sounds like you are describing pseudoscopic arrangements. If your
card images are usually parallel arranged (left eye image on the left),
window reversal is simply putting them on the card as crossed (right eye
image on the left). This would be undesirable from a number of points of
view and none of them directly concern the window at all.

>................
>
>P3D Larry Berlin wrote that making smaller masks for slides is the 
>same as enlarging a negative for a print.  Maybe, but i don't see it 
>that way.  When I make a big enlargement and crop a 2 14/16 inch 
>wide and 3 1/8 inch high stereograph out of it, I think I get a different
>effect, especially if I crop in one corner.  Again, I don't know a lot 
>about slides, but if you put a little mask on a slide  it would appear to
>me that you may be covering up a part of the stereograph that  would 
>enlarge into an acceptable stereo image.  Is this incorrect.?.

******  In your prints you enlarge an image and trim off excess to fit the
card, and place the *window* where you want it. In the slide, if you mask
the same areas of image that you would have trimmed in the print, you are
left with identical image information. The slide is the *original* image,
and yes you lose some image data, but only the same material that you would
have lost in your print trimming. Instead of enlarging before trimming, you
enlarge a slide in the viewer or by projecting. Yes the relative visible
image is less, but if done the same as your print image you have the same
material available and arranged the same relative to the *window*.

>
>Larry also wrote about enlarging, but using a computer first.  Sounds
>good 
>to me but unfortunately I don't know how to do that  yet.  I just bought 
>a scanner (haven't hooked it up yet) so maybe I will get knowledgeable
>enough to learn to manipulate photos.  I plan on it anyway and I will
>probably come up with some real DUMB questions in the process.

******  Main criteria, a good Pentium computer, lots of RAM (64 MB minimum),
plenty of disk space for storage. Then using PhotoStyler, PhotoShop,
PhotoImpact or a number of other similar programs, you scan the image at a
reasonably high DPI resolution. Then edit (enlarge, crop, align, etc.) your
images according to your needs. Take the finished data (likely to be 6 MB to
10 MB +) down to Kinko's or equivalent and have them make a Cyclone copy
from the file. Alternatively you can have the data transfered back to film,
but if you want prints anyway ...  

If you are new to the computer learning curve this will make sense eventually.

>
>Think NSA Seattle
>

*****  See you there!  :-)

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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