
474 A Computational Introduction to Digital Image Processing, Second Edition
Solarization. This is a photographic effect that is obtained by applying diffuse light to
a developing photograph, and then continuing with the development. The result, which
seems somehow magical, is that the image can be partly positive and partly negative.
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This effect has been used by many photographers, but can be a fairly hit or miss affair in
the photographic darkroom. However, it is very easy to create solarization effects digitally.
We have seen examples of solarization functions in Chapter 4; now we explore how they
can be applied.
A simple solarization effect can be