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DEFORMATION TRAPEZOIDALE [1 record]

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Record 1 2017-09-21

English

Subject field(s)
  • Optics
  • Cinematography
  • Photography
CONT

The keystone effect is the apparent distortion of an image caused by projecting it onto an angled surface. It is the distortion of the image dimensions, such as making a square look like a trapezoid, the shape of an architectural keystone, hence the name of the feature.

French

Domaine(s)
  • Optique
  • Cinématographie
  • Photographie
CONT

La distorsion trapézoïdale (keystone) survient toujours quand le projecteur n’est pas exactement dans l’axe de l’écran, ce qui produit un étirement ou une courbure de l’image projetée.

OBS

effet keystone : il vaut mieux éviter ce syntagme qui est un anglicisme.

Spanish

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