|Perception, philosophy: perceptions are conscious or unconscious processings of changes of state or events in the environment or within a living organism. Perceptions are happening in the present. Memories and imaginations are not perceptions. In language usage the expression of perception is used both for the process of perception and for the perceived. See also stimuli, sensations, sense perceptions, computation, memory, ideas._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. |
|Gärdenfors I 121
Perception/Marr/Nishihara/Gärdenfors: (Marr & Nishihara, 1978): in order to describe biological forms, cylindrical basic elements are used, in particular for the fingers, hand, arm, thorax, leg and head. In addition, there are typical angles in which the shapes stand together and typical length ratios.
The vector coordinates for the cylinders and their connecting points constitute a multidimensional space of shapes. Each cylinder corresponds to one point. A metric may be created e.g. through the use of weighted sums over all dimensions at different levels.
In this multidimensional shape space, typical shapes, e.g. of animals can be distinguished. The individual animal types form regions in this space._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution.
Vision: A Computational Investigation into the Human Representation and Processing of Visual Information Cambridge
The Geometry of Meaning Cambridge 2014