MAN page from Mandrake Other XITE-3.3-3.i386.rpm

STDIFF

Section: User Commands (1)
Updated: 16 Mar 1998
Index

NAME

stdiff - local statistical differencing

SYNTAX

stdiff <inimage> <outimage> <deltax> <deltay><alpha> <beta> <m0> <s0>

DESCRIPTION

Local Pixel Value Mapping.

r(x,y) = u(x,y) + s(x,y)
u(x,y) = alpha * m0 + (1-alpha) * bm(x,y)
s(x,y) = (b(x,y)-bm(x,y)) * (beta*s0 / (s0+bs(x,y)))

r(x,y)  = output image
u(x,y)  = mean component
s(x,y)  = st. dev component
m0      = The mean to force locally
alpha   = fraction m0 <--> local mean
b(b,y)  = pixel value in (x,y)
bm(x,y) = local mean
bs(x,y) = local st. dev
s0      = new st. dev
beta    = parameter to control s0 <--> local st.dev

deltaxis local area width, deltayis local area height.

SE ALSO

Wayne Niblack: An introduction to Digital Image Processing

RESTRICTIONS

inimagemust have bands with pixel type unsigned byte.

AUTHOR

Otto Milvang

ID

$Id: stdiff.c,v 1.31 1997/01/30 18:27:02 svein Exp $

This document was created byman2html,using the manual pages.