CHAPTER 20SPECIAL PHASESTEREO IS NOT LIMITED to the making of personal pictures. In
S fact, it is rapidly moving into all industrial, commercial and
scientific fields.
Advertising.-Advertising photography, which includes illustra-
tions, used for reproduction in the advertising space of various
media, remains planar because we have not at this time accepted
any adequate method for reproducing quality stereograms at a
cost commensurate to that of the planar.
However, this is a temporary condition. The fundamental key
to the whole thing has been overlooked because of a very human
psychological quirk.
Everyone who reads has spent years in learning to read fluently,
and it is assumed that one simply looks at a picture and grasps its
meaning. This is not true. The youngster has to learn to see pic-
tures just as he has to learn to walk and to speak. It has been
demonstrated that a savage, seeing his first picture, helplessly
turns it upside down, upon its side, right side up and then gives
up. It is meaningless to him, even when the subject is his own
village!
Some training, some experience is necessary before we can in-
terpret anything at all. But when it is suggested that we spend
just 60 minutes in learning to see three dimensional printed pic-
tures, the suggestion is brushed aside with the typical comment,
“Too much trouble!”
Anyone who has normal vision can learn within one hour to
see a non-transposed stereo pair by the use of convergent vision,
as eyplained elsewhere in this book.
All that is necessary to bring three dimensional printed pictures
into reality is the sustained use, on the part of three or four pub-
lications, of untransposed pairs not exceeding a two inch base!
And the small size is not detrimental, because the subjective size
will be considerably larger than the printed area, making for eco-
nomical use of paper space. It may be years, it may be only
months, but eventually we shall recognize the utility of taking
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