Title: Visual%20semiotics%20and%20space%20cognition:%20on%20the%20dynamics%20of%20two-dimensional%20representations%20of%20space%20and%20action
1Visual semiotics and space cognition on the
dynamics of two-dimensional representations of
space and action
11th Early Fall School of Semiotics SEMIOTICS
AND GENRE September 10-16, 2005, Sozopol,
Bulgaria
2Part I Picture versus text
- The distinction between picture and text involves
a set of basic semiotic challenges. First,
pictures are linked in their production to the
motricity of hands, in their receipt by the eye
and the visual cortex. Language in its basic
form, spoken language, is linked in its
production to the motricity of the human vocal
apparatus (from the vocal cords to the lips) and
in its perception to the ear and the auditory
cortex. The dynamics of these four subsystems and
moreover the coordination of the pairs of
subsystems in production and reception define the
base line of any comparison of picture and text.
3- At least two levels that must be separated
- the evolutionary basic distinction between a mode
of manual/visual and a mode of phonetic/auditory
communication, - the application of manually based techniques to
materials (with color or luminosity differences)
and media (canvas, paper, glass, etc.) applying
specific instruments (crayon, paint-brush, chisel
etc.) is basic for products of the visual arts.
This applies also to writing. As a consequence,
pictures refer to a highly developed culture of
materials, techniques and media
4The linearity of language? A first confrontation
with pictures
Unidirectional process
Dependence on past or future steps of the process
Garden path and reanalysis
Major deviations of the unidirectional linearity
of language.
5Fractal patterns(between d0 und d2
Cantor-set (d lt 1)
Sierpinki-triangle (d lt 2)
6From one dimensional language to two-dimensional
pictures
Virtual dynamics of silence in communication
Virtual dynamics of a square (diagonal,
horizontal/perpendicular and spiral force-lines).
dynamics of corners
dynamics of sub-squares
Rotational dynamics (45o)
7The flat structure of the atom gold
Historical mandalas as a demonstration of the
multiplicity of dynamical and symmetrical
structures in a circular space
8Steady increase in the number of corners (and
therefore of implicit dynamic fields) with d
(dimension)
- two end points in a line segment
- four corners in a square
- eight corners in a cube
- sixteen corners in a four-dimensional cube
- 32, 64, 128 corners if we increase further the
dimensionality of the cube
9Implicit force-fields and the organization of
content
- In producing a picture these force-fields are
relevant. - A strong preference is given to rectangular
frames which are near to the ideal (the square)
but introduce a basic asymmetry. - If we take the painting the Last Supper of
Leonardo da Vinci (cf. Wildgen 2002, 2004b and
2004a chapter 6), the prominent table of the
supper fills the basic horizontal line and Christ
marks the intersection with a vertical line of
symmetry.
10Part II Geometry and Dynamics in the Art of
Leonardo da Vinci
Leonardo da Vinci was born in 1452 in Vinci near
Florence. He made the first steps of his career
in Florence, where he worked under Verrocchio,
became master in his workshop and in 1477
independent master. In 1482 Leonardo asked
Ludovico Sforza in Milan for an employment. He
stayed in Milan until 1499, when Milan was taken
by the French troupes. Leonardo left Milan and
returned to Florence. In 1506 Leonardo was
invited to Milan by the French governor, Charles
d Amboise, and worked there until 1513. He left
Milan because of the pestilence and went to Rome
and left Rome invited by François I, king of
France, together with his pupils Melzi and Salai.
From 1516 until his death in 1519 Leonardo lived
in the Castel Cloux near Amboise in France.
11- The two basic pillars of Leonardos semiotics of
art are - (linear, of color, vanishing) we shall deal with
it under the topic of geometry. - Dynamics (force, weight, counterpoise, balance,
movement, percussion, etc.).
12Last Supper by Leonardo da Vinci (Milan)
13Force-fields in the Last Supper
..\Eigene Dateien\Präsentationen\Narrative
Struktur und visuelle Interpretation.ppt
14- As this example shows, all three force fields we
analyzed in the case of a void frame are used to
organize specific contents (surfaces, figures,
persons in space) in Leonardos mural painting.
The head (ear) of Jesus is at the center of all
force fields. The sub-centers of the groups of
apostles lie in the intersections between the
horizontal axis and the symmetric spiral which
end at Jesus head (ear). The rectangle of the
whole mural painting breaks the symmetry of the
(ideal) square. - The perspective generates a subdivision of the
background space into three equal zones. In the
central zone are situated Jesus, John (at the
right of Jesus), and Thomas, James Major (at the
left of Jesus) Judas is already outside of this
field although he has the second position at the
right of Jesus. Peter and Philip are at the
intersections of these fields. 1
15Basic content complexes organized in Leonardos
painting
- The table in the fore-ground.
- The perspective of the dining room, the windows,
the landscape visible through the window, the
subdivision of the background into three equal
sub-fields. - The arrangement of 12 apostles (grouped by 4 x 3)
on both sides of Jesus. - The gestures (body poses) and glances of Jesus
and his apostles superimpose a further dynamical
structure.
16The geometrical scheme is that of a pyramid with
the angel on the second (visible) side of it. The
front side has on its vertex the face of the
Virgin, on its edges, the Jesus-baby at the right
and St. John Baptist as baby on the left (above
the base-line of Jesus and the angel).
17Mary
protect
hold
Angel
John
point
bless
adore
Jesus
The pyramid in the Virgin in the Rocks.
18The hand gestures alone define five different
force-lines and all four persons have different
gaze-lines involving different angles of the
head. All these forces imply some narrative
context, i.e., Leonardo tries to concentrate a
complex story in the static configuration of one
painting.
Drawing-study for the pointing gesture of the
angel
19The semiotics of a figural composition
A sketch for the Epiphany
20The triangle is asymmetric as the right side is
the line between the gaze of Mary and Jesus which
point to the face of a kneeing Magus. This is the
central force-line inscribed into the triangle.
21 Levels of semiotic analysis- The space
(time) of the scene depicted (perspective,
light/shadow, outfit of the scenario).- The
thematic persons. These constitute a relational
schema which is represented by their relative
positions in space, the static relations and the
movements (e.g., the relative movement of the
head in relation to the trunk, the gestures of
the hands, the directions of gaze).- A
narrative content related to a known episode. The
scene may be identified as one moment resulting
from a series of prior events and having specific
(known) consequences
22Part III Dimensional transitions, symmetry, and
transformations
- An architecture (3-space) is represented in an
illusionist painting (trompe lœil), but one can
neither enter the room nor move before it without
destroying the illusion. - A sculpture is represented in a mural painting
one part may be sculpted, the other painted. In a
proper position against the wall, it may be
difficult to grasp the difference between 3-space
and 2-space. - A text describes a landscape, a building, a
person either directly or as represented in a
painting. - A sentence contains an action scenario (in
3-space time) in its valence structure, e.g.,
Eve gives Adam an apple in the garden Eden. The
action in 3-space time is flattened to a
sentence with verb and case assignments/linear
order.
23Compression of information
- The technique of perspective (rediscovered in the
Renaissance) codes artificially for the third
dimension gestures, glances, frozen actions code
for the temporal dimension. - The technique of valence patterns (control of
NPs), case assignment, etc., codes for the
spatial parameters and allows their flattening
into a sequence of verb (V) subject (S)
object (O), etc. (in different orders dependent
on the type of langue SVO, SOV, VSO, etc.). - All the non-spatial or non-temporal dimensions
are coded for by attributes/shape
modifications/colors in a painting or by lexical
differentiations in a sentence.
24Symmetry and chaos-controllers as guarantees for
semiotic stability
- Group operation on a triangular star
- Identity (translation)
- Rotation (120)
- Mirroring on an axis
25Hexagonal symmetry in a snow flake
26Spatial symmetry in language (rare)
S A T O R
A R E P O
T E N E T
O P E R A
R O T A S
The sower (sator), called Arepo directs (tenet)
The carriage (the wheels rotas) with care
(opera)
27Leytons generative geometry and the semiotics of
pictures
- GENERATIVE GEOMETRY A geometric object is one
from which the transformations are recoverable
i.e. a geometric object is a memory store. - The regularity of the base space is the
presupposition for the generation of
information on deformations, asymmetries
inscribed into the (pre-informative) space.
28Translation
Translation
Rotation
The generation of a square and a rod via group
operations
29Generation of complexity
- By a multiplication of basic types,
- By an intersection or blending of different
entities, e.g. curved (sphere) and straight
(cube). - By an approximation of living forms (plants,
animals, humans) in their geometry. - By the addition of decorative patterns
30Example from architecture the townhall in Bremen
Renaissance transformation of a gothic town hall
Decorative elements
31New geometrical devices in the 20th century
Opera in Sidney, 1957-1973, and the spherical
geometry which underlies its construction
32Conclusions
- Dimensionality fixes the basic geometry and
dynamics which govern the organization of forms. - Symmetries restrict possible constructions and
thus contribute to the stability of the result. - Capacities for meaning generation are created by
possible deviations from the symplest and most
symmetric forms (Leytons axiom). - Natural semiosis is a process of memory
generation and exploits systematically the
geometry and dynamics of underlying forms. - Decorative elements are inserted into the basic
geometric and dynamic structure and profit from
its memory function.
33End of the presentation
- For further materials on the topic, cf.
- http//www.fb10.uni-bremen.de/homepages/homepageby
id.asp?id34