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GRADINV
Section: User Commands (1)
Updated: 16 Mar 1998
Index
NAME
gradInv - gradient invers noise reduction
SYNTAX
gradInv <inimage> <outimage> [<dx> [<dy>]]
DESCRIPTION
Noise reduction by gradient invers smoothing.
dxis the horizontal window size. Default is 3.dyis the vertical window size. Default is dx.
The image border is filtered as good as possible.
RESTRICTIONS
inputand
outputmust have pixel type unsigned byte.
dxand
dymust be greater than 1.If
dx(or
dy)are even,
dx+1 (or
dy+1) is used.
SEE ALSO
gradInv(3)
REFERENCES
- Wang, Vagnucci and Li,
- "Gradient Inverse Weighted Smoothing Scheme and the Evaluationof Its Performance",Comp. Graph. and Im. Proc. 15,167-181 (1981).
AUTHOR
Tor Lønnestad, BLAB, Ifi, UiO
EXAMPLES
gradInv mona.img monaGrad.img
gradInv mona.img monaGrad.img 5
gradInv mona.img monaGrad.img 5 7
ID
$Id: gradInv.c,v 1.22 1997/01/16 16:04:36 svein Exp $
Index
- NAME
- SYNTAX
- DESCRIPTION
- RESTRICTIONS
- SEE ALSO
- REFERENCES
- AUTHOR
- EXAMPLES
- ID
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