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Introduction.
The title, fixed by Comm. VII, seems well chosen, but
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LO if one tries to work it out, an overwhelming number of
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Lit LIL facts and figures, of laws and illusions, of characte-
LL. |— L- ristics and mechanisms, of acuities and activities,
Lt — — —
se spreads over the floor - yes, because a table is by far
too small. At this stage, one wonders how it will ever
be possible to split the cards into a physiological and
a psychological group, aren't they too intimately related and cooperating?
And is there not a third group, or a fourth? Moreover - can we restrict
such a treatise to photo-interpretational aspects only - do photogramme-
rists have different eyes or brains? » e
I think we cannot divide visual perception into Comm. VII and Comm, I
or V, therefore, both professions may find interest in this paper.
One remark on the word "Aspects': The purpose of this
>>
‘a m I 30 minutes talk should not be to list experimental facts
of and findings, for information of this kind the pocket-
« [ay book press supplies the market with a dozen books and
| pn
reprints a year. Therefore, after long hesitation, the
@ Ww choice felt on a presentation in the form of an overall
scheme. It is a personal view, a subjective matrix, but
it allows to oversee the various basic and secundary
aspects of visual perception - and, more to the point, of photo interpre-
tation. It also makes it possible to opponents to fight this somewhat
provocating approach, because a printed scheme can easier be attacked than e e
a non-published line of thought. Eventually, a next victim for an invited
paper may present, over four years, a more acceptable review.
[ The line of thinking passes through the following stations:
2e Basic physiological aspects — objective and measurable properties
3e Important psychological aspects — subjective and variable properties
4. Mixed aspects - responses to complex visual tasks
5, Adaptation and training — changes during lifetime
6. Technical and Human Aspects of Photo-Interpretation
T. Some practical consequences for photo-interpretation ]
