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In geometric optics, distortion is a deviation from rectilinear projection; a projection in which straight lines in a scene remain straight in an image.It is a form of optical aberration that may be distinguished from other aberrations such as spherical aberration, coma, chromatic aberration, field curvature, and astigmatism in a sense that these impact the image sharpness without changing an ...
Barrel distortion visual example: Date: 12 September 2008: Source: Own work: Author: WolfWings: Permission (Reusing this file) US Public Domain: Other versions: Derivative works of this file: Mustache distortion.svg-
Fig. 3a: Barrel distortion Fig. 3b: Pincushion distortion. Even if the image is sharp, it may be distorted compared to ideal pinhole projection. In pinhole projection, the magnification of an object is inversely proportional to its distance to the camera along the optical axis so that a camera pointing directly at a flat surface reproduces that ...
PC Magazine reports 3.1% distortion at 8 mm and 0.7% at 12 mm. [8] It also reports that distortion switches to pincushion distortion of 1.4% at 16 mm. [8] SLAR Gear reports that the point of convergence between barrel and pincushion is about 13 mm. [3] Foreground subjects seem abnormally large compared to similar background subjects with this ...
Fig. 2b: An instrumental pincushion distortion of = leads to an almost complete elimination of the globe effect. The image of an afocal optical instrument is distortion-free if the f-tan theta condition, also known as tangent condition and first defined by Bow and Sutton in 1861, is satisfied: [4] = .
DxO ViewPoint allows users to correct the horizon, keystoning, volume distortion (volume anamorphosis), and a number of lens distortions automatically or through sliders. Lens distortions include barrel, pincushion, and fisheye. DxO ViewPoint's corrections are based on DxO's data created through a large volume of images produced using different ...
In other words, it is a lens with little or no barrel or pincushion distortion. At particularly wide angles, however, the rectilinear perspective will cause objects to appear increasingly stretched and enlarged as they near the edge of the frame. These types of lenses are often used to create forced perspective effects.
The following other wikis use this file: Usage on de.wikipedia.org Kissenverzerrung; Usage on en.wikibooks.org Adventist Youth Honors Answer Book/Health and Science/Optics