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The Government of Canada’s terminology and linguistic data bank.
PINCUSHION DISTORTION [2 records]
Record 1 - internal organization data 2008-02-25
Record 1, English
Record 1, Subject field(s)
- Optics
- Optical Instruments
- Television (Radioelectricity)
- Audiovisual Techniques and Equipment
Record 1, Main entry term, English
- barrel distortion
1, record 1, English, barrel%20distortion
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- barrel-shaped distortion 2, record 1, English, barrel%2Dshaped%20distortion
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A geometric distortion of a rectangular raster causing its boundaries to appear convex. 3, record 1, English, - barrel%20distortion
Record number: 1, Textual support number: 1 CONT
A lens suffers from barrel distortion when the images of straight lines are curved lines which are concave to the centre of the plate or film. 4, record 1, English, - barrel%20distortion
Record number: 1, Textual support number: 1 OBS
Distinguished from pincushion distortion, positive distorsion. 2, record 1, English, - barrel%20distortion
Record 1, Key term(s)
- positive distorsion
Record 1, French
Record 1, Domaine(s)
- Optique
- Instruments d'optique
- Télévision (Radioélectricité)
- Audiovisuel (techniques et équipement)
Record 1, Main entry term, French
- distorsion en barillet
1, record 1, French, distorsion%20en%20barillet
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- distorsion en tonneau 2, record 1, French, distorsion%20en%20tonneau
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 OBS
Si l'on photographie une grille formée de barreaux droits égaux et équidistants, l'image doit les restituer parfaitement rectilignes; lorsque les barreaux marginaux sont incurvés vers l'extérieur, la distorsion est dite «en barillet», s'ils sont incurvés vers l'intérieur c'est une distorsion «en coussinet» [...] 3, record 1, French, - distorsion%20en%20barillet
Record number: 1, Textual support number: 1 CONT
Suivant la forme que présentent les courbes représentant la distorsion, on distingue la «distorsion en croissant» et la «distorsion en barillet». 4, record 1, French, - distorsion%20en%20barillet
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Óptica
- Instrumentos ópticos
- Televisión (Radioelectricidad)
- Técnicas y equipo audiovisuales
Record 1, Main entry term, Spanish
- distorsión en barrilete
1, record 1, Spanish, distorsi%C3%B3n%20en%20barrilete
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, Textual support number: 1 CONT
Al diafragmar una lente simple se produce una distorsión que puede manifestarse con dos aspectos diferentes, según la posición del diafragma [...]: si el diafragma se halla frente a la lente, la imagen dada por ésta adolece de distorsión en barrilete y las rectas de la cuadrícula aparecen como curvas con su concavidad hacia el eje óptico; por el contrario, la posición del diafragma detrás de la lente, da una distorsión en corsé [...] 1, record 1, Spanish, - distorsi%C3%B3n%20en%20barrilete
Record 2 - internal organization data 2001-04-05
Record 2, English
Record 2, Subject field(s)
- Optics
Record 2, Main entry term, English
- pillow distortion
1, record 2, English, pillow%20distortion
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
... image preview did not always make this lack of focus obvious. At the shortest focal length, there was moderate "pillow distortion". meaning horizontal and vertical lines were bent outward from the center of the image. 2, record 2, English, - pillow%20distortion
Record number: 2, Textual support number: 2 CONT
Unfortunately, some lenses will distort the projection, rendering it difficult to analyze. The two common types of lens distortion are pillow distortion, where the corners of the photo seem stretched out, and pincushion distortion, where the corners are compressed towards the centre. In both of these, lines that are straight in real life end up with a curve on the photograph. 3, record 2, English, - pillow%20distortion
Record 2, French
Record 2, Domaine(s)
- Optique
Record 2, Main entry term, French
- coussinet
1, record 2, French, coussinet
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
[...] déformation vers le centre de l'image des droites d'un quadrillage régulier observées dans une lentille diaphragmée. 2, record 2, French, - coussinet
Record number: 2, Textual support number: 1 CONT
Un objectif peut avoir différents types de distorsions. Les plus communs sont le barillet et le coussinet. Le barillet se produit quand les bords de l'image sont bombées vers l'extérieur, donnant l'impression que l'image a été tendue sur une surface sphérique. Le coussinet est plus rare et donne l'impression inverse. Le barillet est assez commun dans les objectifs grands-angulaires et peut être particulièrement prononcé lorsque le sujet est très proche de l'objectif. 3, record 2, French, - coussinet
Record 2, Spanish
Record 2, Textual support, Spanish
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