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Animation of a half-turn ambigram of the word ambigram, with 180-degree rotational symmetry [1]. An ambigram is a calligraphic composition of glyphs (letters, numbers, symbols or other shapes) that can yield different meanings depending on the orientation of observation.
A camera obscura (pl. camerae obscurae or camera obscuras; from Latin camera obscūra 'dark chamber') [1] is the natural phenomenon in which the rays of light passing through a small hole into a dark space form an image where they strike a surface, resulting in an inverted (upside down) and reversed (left to right) projection of the view outside.
picture dec picture dec picture circle with left half black upper half circle white square with upper left quadrant 0 ◐ ◠ ◰ ◐ ◠ ◰ circle with right half black lower half circle white square with lower left quadrant 1 ◑ ◡ ◱ ◑ ◡ ◱ circle with lower half black black ...
Isometric video game graphics are graphics employed in video games and pixel art that use a parallel projection, but which angle the viewpoint to reveal facets of the environment that would otherwise not be visible from a top-down perspective or side view, thereby producing a three-dimensional (3D) effect.
The performer takes a deck of cards, and places on the table two face-up "marker" cards, one black and one red; the black on the left and the red on the right.The performer tells the spectator that he or she is going to deal cards face-down from the deck and the object of the exercise is for the subject to use their intuition to identify whether each card in the deck is black or red.
Two-dimensional mirror images can be seen in the reflections of mirrors or other reflecting surfaces, or on a printed surface seen inside-out. If we first look at an object that is effectively two-dimensional (such as the writing on a card) and then turn the card to face a mirror, the object turns through an angle of 180° and we see a left ...
In a physical photograph the colour and luminance can only be inverted in tandem, but digital processing allows each to be inverted separately. If the hue of an image is rotated by 180 degrees, then the colour of the image is inverted but not its luminance. The negative of such an image has the luminance inverted but not the colour.
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