BESTIMMUNG DER SENKRECHTEN PROJEKTIONEN VON GEWÖLBEN UND DECKENGEMÄLDEN DURCH KONSTRUKTION, ANHAND EINER PHOTOAUFNAHME

Authors

  • A. Horn

Abstract

Determination 0f Orthogonal Projections 0f Vaults and Ceiling Frescos by Constructing from Photographs The normal stereograms are pairs of photographs taken by a camera from two different sites in such a way that the images are on the same plane, e.g. a camera placed on the floor, when the optical axes are vertical and the image planes are in the same horizontal plane. On such a pair of pictures the elements of the vault or fresco lying in a horizontal level-plane remain similar to the original ones, their images will be congruent and thus they can be brought in covering. If we construct on the pictures the perpendicular projections of the basis connecting the exposure sites, and keeping them in covering we move them on each other the two images of other and other point groups will coincide belonging to other and other level-plane. The length (1) of the basis for the image-pair, the varying basis length (2) applied at the evaluation, the distance (3) of the level-plane of the object point measured from the optical centre of the lens and the distance (4) of the optical centre from the plane of the image create a proportion of which (1) and (4) are constant, (2) is varying and measurable and thus (3) is constructable and computable. Thence the points lying in different level-planes of a vault or a fresco can be reconstructed from which the ground plan and the elevation plan of the formation can be reconstructed.

How to Cite

Horn, A. (1991) “BESTIMMUNG DER SENKRECHTEN PROJEKTIONEN VON GEWÖLBEN UND DECKENGEMÄLDEN DURCH KONSTRUKTION, ANHAND EINER PHOTOAUFNAHME”, Periodica Polytechnica Architecture, 35(1-2), pp. 3–18.

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Articles