TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The perspective control lens(PC) is a special wide angle lens with a front that can be shifted up or down or side to side in its rotating mount so that you can encompass the top of the building while keeping the camera level for minimal distortion.  1, record 1, English, - perspective%20control%20lens

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

Les objectifs de ce genre permettent de corriger les lignes verticales et horizontales des images en rétablissant leur parallélisme par l'effet de leur déplacement de haut en bas et de gauche à droite et de leur pivotement. Il est ainsi possible de contrôler les effets de la perspective et de produire des images plus précises et plus agréables à l'œil. Certains objectifs de ce genre, par un jeu de bascule, permettent d'accroître la profondeur de champ.  2, record 1, French, - objectif%20avec%20d%C3%A9centrement

Record number: 1, Textual support number: 2 OBS

L'objectif avec décentrement dont l'absence constituait une lacune pour le petit format est maintenant d'emploi courant pour la photo d'architecture.  1, record 1, French, - objectif%20avec%20d%C3%A9centrement

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Extreme wide-angle lens covering an angular field of over 140 degrees(typically around 180 degrees but can extend to over 200 degrees with increasing "barrel distortion" towards the edges of the field.  2, record 2, English, - fish%2Deye

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Terme désignant un objectif à très grand angle (environ 180 degrés) utilisé pour obtenir un champ maximal ou des effets spéciaux.  1, record 2, French, - %26oelig%3Bil%2Dde%2Dpoisson

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Image displacement caused by lens irregularities and aberrations.  1, record 3, English, - lens%20distortion

Record number: 3, Textual support number: 1 CONT

Distortion is caused because the transverse magnification may be a function of the off-axis image distance. Distortion is classified as positive (so-called piscushion distortion) or negative (so-called barrel distortion).  3, record 3, English, - lens%20distortion

Record number: 3, Textual support number: 1 OBS

lens distortion : term and definition standardized by NATO.  4, record 3, English, - lens%20distortion

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Déformation de l'image optique due aux aberrations et imperfections d'un système optique.  1, record 3, French, - distorsion

Record number: 3, Textual support number: 2 DEF

Aberration due au fait que les objets situés en dehors de l'axe présentent des agrandissements angulaires qui sont fonction de leur distance de l'axe.  5, record 3, French, - distorsion

Record number: 3, Textual support number: 1 CONT

La distorsion ne compromet pas la netteté, mais la fidélité de l'image : les points les plus périphériques sont trop proches de l'axe optique. Un système exempt de distorsion est dit orthoscopique.  6, record 3, French, - distorsion

Record number: 3, Textual support number: 1 OBS

distorsion : terme et définition normalisés par l'OTAN.  7, record 3, French, - distorsion

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Deformación de la imagen óptica causada por las irregularidades o aberraciones de una lente.  1, record 3, Spanish, - distorsi%C3%B3n%20de%20una%20lente

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

Curvilinear distortion of an optical or electronic image in which horizontal and vertical straight lines appear concave, bowed inwards.  2, record 4, English, - pincushion%20distortion

Record number: 4, Textual support number: 2 DEF

Optical distortion of the image formed by an uncorrected lens. Straight lines parallel to the edge of the field are reproduced as curved lines convex towards the optical axis.  5, record 4, English, - pincushion%20distortion

Record number: 4, Textual support number: 1 OBS

Compare "barrel distortion".  6, record 4, English, - pincushion%20distortion

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Distorsion géométrique telle que les lignes ne passant pas par l'axe optique ou le centre de l'image sont reproduites avec une convexité dirigée vers ce centre et qui croît avec la distance à celui-ci.  2, record 4, French, - distorsion%20en%20coussinet

Record number: 4, Textual support number: 1 CONT

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» [...]  5, record 4, French, - distorsion%20en%20coussinet

Record 4,  Textual support,  Spanish

Record number: 4, 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 4, Spanish, - distorsi%C3%B3n%20en%20cors%C3%A9

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A geometric distortion of a rectangular raster causing its boundaries to appear convex.  3, record 5, English, - barrel%20distortion

Record number: 5, 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 5, English, - barrel%20distortion

Record number: 5, Textual support number: 1 OBS

Distinguished from pincushion distortion, positive distorsion.  2, record 5, English, - barrel%20distortion

Record 5,  Textual support,  French

Record number: 5, 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 5, French, - distorsion%20en%20barillet

Record number: 5, 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 5, French, - distorsion%20en%20barillet

Record 5,  Textual support,  Spanish

Record number: 5, 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 5, Spanish, - distorsi%C3%B3n%20en%20barrilete

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

The determination of the calibrated focal length, the location of the principal point with respect to the fiducial marks and the lens distortion effective in the focal plane of the camera referred to the particular calibrated focal length.  1, record 6, English, - camera%20calibration

Record number: 6, Textual support number: 1 OBS

camera calibration: term and definition standardized by NATO.  2, record 6, English, - camera%20calibration

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Détermination de la distance focale. Détermination de la position du point principal par rapport aux repères. Détermination de la distorsion de l'objectif dans le plan focal de l'appareil, pour la distance focale étalonnée au préalable.  1, record 6, French, - %C3%A9talonnage%20d%27un%20appareil%20photographique

Record number: 6, Textual support number: 1 OBS

étalonnage d'un appareil photographique : terme et définition normalisés par l'OTAN.  3, record 6, French, - %C3%A9talonnage%20d%27un%20appareil%20photographique

Record 6,  Textual support,  Spanish

Record number: 6, Textual support number: 1 DEF

Determinación de la distancia focal exacta, situación del centro óptico en relación con las líneas de fe y la distorsión efectiva de las lentes en el plano focal de la cámara, referida a la distancia focal particular.  1, record 6, Spanish, - calibraci%C3%B3n%20de%20c%C3%A1mara

Record 7,  Textual support,  English

Record number: 7, 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 7, English, - pillow%20distortion

Record number: 7, 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 7, English, - pillow%20distortion

Record 7,  Textual support,  French

Record number: 7, 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 7, French, - coussinet

Record number: 7, 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 7, French, - coussinet

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

A procedure used to reduce the field of view of a [flame] detector by means of an opaque plate or card with a selected sized opening. This is frequently required to reduce refractory interference to acceptable levels.  2, record 8, English, - orificing

Record number: 8, Textual support number: 1 CONT

The S512 with its PbS photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action(compression). However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing(placing disk with small aperture in front of lens to reduce the amount of light or radiation).  3, record 8, English, - orificing

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Action d'occulter (une source lumineuse); [...]  1, record 8, French, - occultation

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

The point at which an increased input signal no longer increases the amplifier output.  3, record 9, English, - amplifier%20saturation

Record number: 9, Textual support number: 1 CONT

The S512 with its PbS [lead sulfide] photo detector has a linear response from low to medium brightness flames, that is, no distortion of flame signal occurs with regard to any amplifier saturation or AGC action(compression), However, saturation will occur with the PbS element on bright flame. This condition can easily be rectified by using orificing(placing disk with small aperture in front of lens to reduce the amount of light or radiation).  4, record 9, English, - amplifier%20saturation

Record number: 9, Textual support number: 1 OBS

flame signal amplifier: the part of the flame detection system which increases the flame signal to a magnitude sufficient to pull in the flame relay in the flame safeguard control.  3, record 9, English, - amplifier%20saturation

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 CONT

Le convertisseur à résistance négative, étudié en préliminaire, est utilisé pour compenser les pertes d'un circuit LC, en particulier celles de l'inductance. On enregistre alors la «naissance» de l'oscillation qui permet de mettre en évidence la partie à croissance exponentielle et la stabilisation de l'amplitude due à la saturation de l'amplificateur.  2, record 9, French, - saturation%20de%20l%27amplificateur

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

Several programs have been developed for the adjustment of aerotriangulation measurements. Programs which adjust the entire block of photographs simultaneously are more rigourous & provide greater accuracy than programs using approximate or sequential methods. Recent progress has been made in the development of an adjustment program which compensates for factors such as non-uniform film deformation, departures from flatness of camera platen, & changes in lens distortion. This method is known as the bundle adjustment method with self-calibration.  1, record 10, English, - bundle%20adjustment

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 DEF

A lens specially corrected for distortion so that straight lines are reproduced accurately even on the margins of the pictures.  1, record 11, English, - rectilinear%20lens

Record 11,  Textual support,  French

Record number: 11, Textual support number: 1 OBS

rectiligne : Se dit d'un objectif de type ancien, corrigé de la courbure de champ (parfois au détriment du stigmatisme).  1, record 11, French, - objectif%20rectiligne

Record 11,  Textual support,  Spanish