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2. Bliss (photograph) - Wikipedia

   en.wikipedia.org/wiki/Bliss_(photograph)

   Bliss, originally titled Bucolic Green Hills, is the default wallpaper of Microsoft's Windows XP operating system. It is an unedited photograph of a green hill and blue sky with white clouds in the Los Carneros American Viticultural Area of Wine Country, California. Charles O'Rear took the photo in January 1996 and Microsoft bought the rights ...

3. List of optical illusions - Wikipedia

   en.wikipedia.org/wiki/List_of_optical_illusions

   The Hering illusion (1861): When two straight and parallel lines are presented in front of radial background (like the spokes of a bicycle), the lines appear as if they were bowed outwards. Hollow-Face illusion: The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face.

4. Wallpaper (computing) - Wikipedia

   en.wikipedia.org/wiki/Wallpaper_(computing)

   A computer screen showing a background wallpaper photo of the Palace of Versailles A wallpaper from fractal. A wallpaper or background (also known as a desktop background, desktop picture or desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a graphical user interface on the screen of a computer, smartphone or other electronic device.

5. Wallpaper group - Wikipedia

   en.wikipedia.org/wiki/Wallpaper_group

   A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art, especially in textiles, tiles, and wallpaper. The simplest wallpaper group, Group p 1 ...

6. Matte (filmmaking) - Wikipedia

   en.wikipedia.org/wiki/Matte_(filmmaking)

   Matte (filmmaking) Mattes are used in photography and special effects filmmaking to combine two or more image elements into a single, final image. Usually, mattes are used to combine a foreground image (e.g. actors on a set) with a background image (e.g. a scenic vista or a starfield with planets). In this case, the matte is the background ...

7. Schlieren photography - Wikipedia

   en.wikipedia.org/wiki/Schlieren_photography

   Schlieren photography is a process for photographing fluid flow. Invented by the German physicist August Toepler in 1864 to study supersonic motion, it is widely used in aeronautical engineering to photograph the flow of air around objects. The process works by allowing normally unobservable changes in a fluid's refractive index to be seen, [ 1 ...

8. Barrier-grid animation and stereography - Wikipedia

   en.wikipedia.org/wiki/Barrier-grid_animation_and...

   Barrier-grid animation or picket-fence animation is an animation effect created by moving a striped transparent overlay across an interlaced image. The barrier-grid technique originated in the late 1890s, overlapping with the development of parallax stereography (Relièphographie) for 3D autostereograms. The technique has also been used for ...

9. Color scheme - Wikipedia

   en.wikipedia.org/wiki/Color_scheme

   Near neutrals can be of any hue or lightness. For example, the "Achromatic" use of a white background with black text is an example of a basic and commonly default color scheme in web design. Neutrals are obtained by mixing pure colors with white, black or gray, or by mixing two complementary colors. In color theory, neutral colors are colors ...