Neuromyotonia

The cubic of Necker is a Optical illusion published for the first time in 1832 by the crystallographer Suisse Louis Albert Necker.

Ambiguity

The cube of Necker is an ambiguous drawing. It is a drawing of the edges of a cube in riding Perspective, which means that the parallel edges of the cube are drawn with parallel lines on the drawing. When two lines cross, the drawing does not show which is in front of and which is behind. This makes the drawing ambiguous; it can be interpreted in two different ways. When a person observes the drawing, she will notice alternatively each of two valid interpretations (it is a Perception multistable).

The effect is interesting, because each part of drawing is itself ambiguous, the human eye then makes an individual interpretation of each part which makes the whole homogeneous. The cube of Necker is often used to test the data-processing models of the human visual system to see whether they arrive to an interpretation of the image similar to that of human.

The man does not arrive in general to an irrational interpretation of the cube. A cube whose edges cross in an incoherent way is called a impossible Objet, more specifically a impossible Cube.

On the cube of left, the majority of people see the part in bottom on the left as being ahead. That probably comes owing to the fact that people perceive the objects over, with the visible high face, much more often than by lower part, with the visible low face. The Cerveau “then prefers” the interpretation of the cube seen top.

There is evidence that a more marked concentration on parts different from the figure can lead to a more stable visualization of the cube. The intersection of the two faces parallel with the observer forms a rectangle, and the lines which cross on the level of the square form an intersection in Y at the two opposite sides. If an observer concentrates on the intersection in Y top, the face in bottom on the left will appear ahead. The face in top on the right will appear in overprinting if the observer concentrates on the intersection in Y of bottom (Einhauser, and Al , 2004).

The cube of Necker can spread the light on the human visual system. Sidney Bradford, blind man of birth but regaining the sight after an operation at 52 years, did not perceive the ambiguity which the valid observers see.

Theory of knowledge

The cube of Necker is used in theory of knowledge and makes it possible to counter-attack the naive Réalisme. Naive realism establishes that the world is such as we perceive it.

The cube of Necker seems to dismount this theory: we see a cube, but actually there is no cube of the whole, just a figure with 2 Dimension S of 12 lines. We see something which is not really there, which would disapprove naive realism. This critic of naive realism supports thesis of the representative Réalisme there.

See too

External bonds

  • Did you note the signal side off cubic the?
  • history off the cubic and has Java applet
  • modelling human perception off the cubic
  • Optical illusions - Impossible Cube
  • Necker Cube: In Visual Illusion At Cut-tea-knot
  • Explanation off the Necker cubes and other gestalt phenomena

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