International Stereoscopic Union















 

A Glossary of Stereoscopic Terms

diplopia

'Double vision': in stereo viewing, a condition where the left and right homologues in a stereogram remain separate instead of being fused into a single image.

disparate images

A pair of images which fail as a stereogram (eg, due to distortion, poor trimming, masking, mismatched camera lenses, or the like).

displacement

Accidental (or, sometimes, deliberate) misalignment of homologues in a stereogram, often due to movement of the two frames on the mask or mount from their true positions.

distortion

In general usage, any change in the shape of an image that causes it to differ in appearance from the ideal or perfect form.

In stereo, usually applied to an exaggeration or reduction of the front-to-back dimension (coll. stretch and squeeze respectively).

divergence

The opposite of convergence: a condition where the eyes' lines of sight 'toe-out' from each other.

dwarfism (coll.)

See Lilliputism.

European format - (coll.)

Term often applied (especially in USA) to denote a 7-perforation 35mm stereo slide image (i.e., one which is 28mm to 30mm wide). Derived from the fact that this format was first used in the Verascope F40 and some other post-war stereo cameras made in Europe.

 


   

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