Image Processing Reference
In-Depth Information
Table 11.3
The regular tessellations in the context of design and CA shading. *Those two
types although have different shapes, are based on identical CA logic.
Occurrence in nature
Design
Visual
attractiveness
CA shading
Impact on the
pattern
Extremely rare in macro
scale in nature (e.g.: bis-
muth and galena crystals,
cobwebs of
Cyrtophora cit-
ricola
[42]).
Rectangular
or
square
Not particularly
attractive
The easiest
to apply.
Each CASS
module
meshes
are
prevalent
in
built environment.
Neutral
is
identical.
Regular triangular meshes
do not occur naturally in
macro scale.
Triangles are the only poly-
gons that are rigid in plane
[34]. Although this prop-
erty is particularly useful in
architecture and engineer-
ing, triangular grid is rela-
tively rarely exposed in the
built environment.
Relatively
interesting
Some CASS
require
two
types
of
Strong
modules*.
It is encountered in macro
scale in nature more often
than other types of regu-
lar grids (e.g.: honeycomb,
basalt columns). Therefore
it carries certain visual or-
ganic appeal.
Since it is the only regu-
lar tessellation without sin-
gle points of contact, the
patterns appear as the most
coherent. Nevertheless, it is
relatively rare in human de-
sign.
Very attractive
Some CASS
require
two
Minimal
types
of
modules*.
Fig. 11.8
PFSS opacity as a function of dihedral rotation on regular tessellations
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