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Curvilinear barrel distortion Curvilinear pincushion distortion. Curvilinear perspective, also five-point perspective, is a graphical projection used to draw 3D objects on 2D surfaces, for which (straight) lines on the 3D object are projected to curves on the 2D surface that are typically not straight (hence the qualifier "curvilinear" [citation needed]).
In a circular fisheye lens, the image circle is inscribed in the film or sensor area; in a diagonal ("full-frame") fisheye lens, the image circle is circumscribed around the film or sensor area. This implies that using a fisheye lens for a different format than it was intended for is easy (as opposed to a rectilinear lens), and may change its ...
Kim in the middle of producing a drawing, 2014. Kim was famous for his detailed illustrations, ink and brush artistic style, and skill at drawing from memory. [2] [10] [14] He could complete his drawings entirely from his imagination, without the use of sketches, visual references, or other preparatory aids, and often used exotic forms of perspective, such as curvilinear perspective.
Furnas, George W. "Generalized fisheye views." in Human Factors in Computing Systems CHI ‘86 Conference Proceedings, 16-23. 1986. Furnas, George W., et al. "The vocabulary problem in human-system communication." Communications of the ACM 30.11 (1987): 964-971. Deerwester, Scott C., et al. "Indexing by latent semantic analysis."
(a digital camera with an image sensor which size is similar to 35 mm film in film cameras as the standard film camera format) [2] The vast majority of video and still cameras use lenses that produce nearly rectilinear images. A popular alternative type of lens is a fisheye lens which produces a distinctly curvilinear, wide-angled result.
Peleng 3.5/8A is an 8 mm super-wideangle circular fisheye photographic lens, and is designed as an interchangeable lens for Canon, Nikon, Pentax, Olympus digital or film cameras which have or do not have the instant-return diaphragm automatic control device [clarification needed]. The lens has a variable diaphragm from f/3.5 to f/16.
An image made with an ultra wide-angle fisheye lens covering the normal film frame of 1:1.33 is not automatically considered to be a panorama. An image showing a field of view approximating, or greater than, that of the human eye – about 160° by 75° – may be termed panoramic.
Bird's-eye views can be an aerial photograph, but also a drawing, and are often used in the making of blueprints, floor plans and maps. [ 1 ] Before crewed flight was common, the term "bird's eye" was used to distinguish views drawn from direct observation at high vantage locations (e.g. a mountain or tower), from those constructed from an ...