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


Harris Geospatial / Docs Center / Libraries / Salvaggio / CREATE_DCT_MATRIX

CREATE_DCT_MATRIX

CREATE_DCT_MATRIX

Name


    CREATE_DCT_MATRIX

Purpose


    This function computes the DCT matrix that can be used in place of the
    discrete cosine transform for square, two-dimensional block data. This
    matrix, M, is used as Y = M ## X ## M' to compute the DCT, Y, of the
    square, two-dimensional data array X.

Category


    General.

Calling Sequence


    Result = CREATE_DCT_MATRIX( dimension )

Inputs


    dimension
      A scalar describing the dimension of the square DCT matrix to be
      determined. This parameter specifies the number of columns/row
      in the returned matrix.

Keyword Parametrs


    None

Return Value


    Result is a double precision, floating point array containing the coefficients
    to compute the DCT of any block array of the specified size.

Side Effects


    None

Requires


    None

Modification History


    Written by: Carl Salvaggio
    February, 2009 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.



© 2017 Exelis Visual Information Solutions, Inc. |  Legal
My Account    |    Buy    |    Contact Us