Motion in a still photograph

This is a study of how motion could be suggested in a still image or
photograph. It was prompted by a slide show challenge by Brian Jenkins of the
Cambridge Camera Club. Brian gave us a short sequence of sounds and invited
us to fit a slide show to it.

The first sound was of traffic, obviously in motion, but how could a still
picture suggests such motion? The idea of general blurring was used but was
not really effective. The question I asked myself was how could one effectively
suggest motion in a still image?

There are many theoretical studies of the way we perceive motion in a still
image, but they are mainly concerned with the psychological and physiological
behavior of the brain and eye.

My interest was not why did it work,but how could it be achieved. I set out
to be pragmatic and use my own judgment, but also to look at methods already
employed in the arts or commerce, to see if my ideas were confirmed in practice.

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