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STDEV

Section: C Library Functions (3)
Updated: 16 Mar 1998
Index

 

NAME

stdev - calculation of local standard deviation

 

SYNTAX

 #include <xite/stdiff.h>

 int stdev( IBAND input, IBAND output, int dx,
    int dy );

 

DESCRIPTION

stdevcalculates and returns the standarddeviation in a local window of size dx* dy.The border is also processed, calculating thestandard deviation over the part of the windowthat is defined.

 output(x,y) = sqrt(SUM(sqr(input(x,y)-
                        mean(x,y)))/windowsize)

 

RESTRICTIONS

inputand outputmust have pixel type unsigned byte.

 

RETURN VALUE

0 => ok1 => bad pixel type input2 => bad pixel type output3 => bad dx value4 => bad dy value

 

AUTHOR

Tor Lřnnestad, BLAB, Ifi, UiO

 

ID

$Id: stdev.c,v 1.24 1997/01/10 16:15:09 svein Exp $

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Index

NAME

SYNTAX

DESCRIPTION

RESTRICTIONS

RETURN VALUE

AUTHOR

ID

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