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The simplest application of image geometry correction is a specific case known as keystone distortion correction derived from Keystone effect.Keystone distortion gets its name from the symmetric trapezoidal distortion resulting from misaligned projector placement in the vertical dimension (although the term is generally applied to the non-symmetric quadrilateral shape that occurs from an off ...
Many bicycle brands have introduced their own dimensions for bottom bracket bearings, [5] and the different use of terminology by the various manufacturers has been described as confusing. [7] An old American term for the bottom bracket is hanger. This is usually used in connection with Ashtabula cranks, alternatively termed one-piece cranks.
sill - a stud sized member forming the base of a window assembly or the base of wall. mudsill - a stud sized member that forms the base of a wall and has been treated against insects and decay. top plate or double top plate - a stud sized member that forms the top of the wall. In cases where other members must bear or brace on the top of the ...
Warped product of two Riemannian (or pseudo-Riemannian) manifolds = (,) and = (,) with respect to a function : is the product space with the metric tensor (). [ 1 ] [ 2 ] Warped geometries are useful in that separation of variables can be used when solving partial differential equations over them.
The association of a dual basis with a basis gives a map from the space of bases of V to the space of bases of V ∗, and this is also an isomorphism. For topological fields such as the real numbers, the space of duals is a topological space, and this gives a homeomorphism between the Stiefel manifolds of bases of these spaces.
A stylized anchor plate in the cloister of the Church of St. Trophime, Arles (France). An anchor plate, floor plate [1] or wall washer is a large plate or washer connected to a tie rod or bolt.
In woodworking, the boring tool is static in size and used to form circular plunge cuts. In metalworking, boring is slightly different in that the hole that results need not be circular. In metal boring the tool can be plunged and dragged on the X or Y axes to create a slot or asymmetrical hole or channel, or it may be moved only in an up-and ...
In cinematography, perspective distortion also has bearing on the in-camera special effect known as the dolly zoom, in which a zoom lens zooms out at the same time as the camera moves toward the subject, in such a way as to keep the subject the same size in the frame while the background "changes size" relative to the subject.