Welcome to the Harris Geospatial product documentation center. Here you will find reference guides, help documents, and product libraries.


  >  Docs Center  >  Libraries  >  Salvaggio  >  PROJECTIVE_MAPPING_MATRIX

PROJECTIVE_MAPPING_MATRIX

PROJECTIVE_MAPPING_MATRIX

Name


    PROJECTIVE_MAPPING_MATRIX

Purpose


    This function will compute the projective transformation matrix
    to allow the conversion between two sets of quadrilateral
    vertices, one set being considered the image and the other being
    considered the map. The determined transformation, mappingMatrix,
    can be subsequently used to convert a homogenous map coordinate [u,v]
    to a homogenous image coordinate [x,y] according to the following
    expression
    [x, y, 1] = TRANSPOSE( NORMH( mappingMatrix ## TRANSPOSE( [u, v, 1] ) ) )

Category


    GENERAL.

Calling Sequence


    result = PROJECTIVE_MAPPING_MATRIX( imageX, imageY, mapX, mapY )

Inputs


    imageX
      A 4-element vector containing the x coordinates of the vertices
      defining the quadritalteral on the image to be transformed.
    imageY
      A 4-element vector containing the y coordinates of the vertices
      defining the quadritalteral on the image to be transformed.
    mapX
      A 4-element vector containing the x coordinates of the vertices
      defining the quadritalteral on the map to serve as a target for
      the transform.
    mapY
      A 4-element vector containing the y coordinates of the vertices
      defining the quadritalteral on the map to serve as a target for
      the transform.

Keyword Parametrs


    None.
  :ERROR CHECKING:
    None.

Side Effects


    None.

Requires


    None.

Modification History


    Written by: Carl Salvaggio
    January, 2012 Original code
   

Disclaimer


    This source code is provided "as is" and without warranties as to performance
    or merchantability. The author and/or distributors of this source code may
    have made statements about this source code. Any such statements do not
    constitute warranties and shall not be relied on by the user in deciding
    whether to use this source code.
    This source code is provided without any express or implied warranties
    whatsoever. Because of the diversity of conditions and hardware under which
    this source code may be used, no warranty of fitness for a particular purpose
    is offered. The user is advised to test the source code thoroughly before
    relying on it. The user must assume the entire risk of using the source code.



© 2018 Harris Geospatial Solutions, Inc. |  Legal
My Account    |    Store    |    Contact Us