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  2. Illusory contours - Wikipedia

    en.wikipedia.org/wiki/Illusory_contours

    Illusory contours provide clues for how the visual system constructs surfaces when portions of the surface's edge are not visible. The encoding of surfaces is thought to be an indispensable part of visual perception, forming a critical intermediate stage of visual processing between the initial analysis of visual features and the ability to ...

  3. Stroboscopic cupola - Wikipedia

    en.wikipedia.org/wiki/Stroboscopic_cupola

    Rapidly rotating the external cylinder (in case of the Char 2C tank design at 300 rpm with an electric motor) [1] created the visual illusion of seeing through the cupola as if not there due to human persistence of vision, similar to how a plank fence with alternating planks and holes fades from view when the observer moves alongside it at a ...

  4. Multistable perception - Wikipedia

    en.wikipedia.org/wiki/Multistable_perception

    Examples of visually ambiguous patterns. From top to bottom: Necker cube, Schroeder stairs and a figure that can be interpreted as black or white arrows. Multistable perception (or bistable perception) is a perceptual phenomenon in which an observer experiences an unpredictable sequence of spontaneous subjective changes.

  5. Poggendorff illusion - Wikipedia

    en.wikipedia.org/wiki/Poggendorff_illusion

    The magnitude of the illusion depends on the properties of the obscuring pattern and the nature of its borders. [ 3 ] Many detailed studies of the illusion, including "amputating" various components [ 4 ] [ 5 ] point to its principal cause: acute angles in the figure are seen by viewers as expanded [ 6 ] [ 7 ] though the illusion diminishes or ...

  6. Illusionistic ceiling painting - Wikipedia

    en.wikipedia.org/wiki/Illusionistic_ceiling_painting

    The perspective of this illusion is centered towards one focal point. The steep foreshortening of the figures, and the painted walls and pillars were and are used to create an illusion of deep recession; a heavenly sphere or even an open sky. Paintings on ceilings could, for example, simulate statues in niches or openings revealing the sky.

  7. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.

  8. Kinetic depth effect - Wikipedia

    en.wikipedia.org/wiki/Kinetic_depth_effect

    In visual perception, the kinetic depth effect is the phenomenon whereby the three-dimensional structural form of an object can be perceived when the object is moving. In the absence of other visual depth cues , this might be the only perception mechanism available to infer the object's shape.

  9. Autokinetic effect - Wikipedia

    en.wikipedia.org/wiki/Autokinetic_effect

    The autokinetic effect (also referred to as autokinesis and the autokinetic illusion) is a phenomenon of visual perception in which a stationary, small point of light in an otherwise dark or featureless environment appears to move. [1]