MAN page from Mandrake Other XITE-3.3-3.i386.rpm
ADDW
Section: User Commands (1)
Updated: 16 Mar 1998
Index
NAME
addw - add two bands pixel by pixel, with weights
SYNTAX
addw [-t <title>] [-w1 <w1>] [-w2 <w2>]
[-offset <offset>] <input1> <input2> <output>
DESCRIPTION
addwcalculates, pixel by pixel, for each pair ofbands, the weighted sum of input1 and input2.
output(x,y) = w1*input1(x,y) + w2*input2(x,y) + offset
For complex or double complex bands, the result is
output(x,y).re = w1*input1(x,y).re + w2*input2(x,y).re
+ offset
output(x,y).im = w1*input1(x,y).im + w2*input2(x,y).im
+ offset
If the result is outside the pixeltype range, the result istruncated. Within the pixeltype range, the result is roundedto the nearest possible pixelvalue.
OPTIONS
- -t title
- titleof the new image. Default: "Weighted sum"
- -w1 w1
- Weight of input1.Default: 0.5.
- -w2 w2
- Weight of input2.Default:0.5.
- -offset offset
- Default: 0.0
RESTRICTIONS
Corresponding bands of the two input images must be of thesame pixel type. Only the largest rectangle common to twoinput bands are added.
SEE ALSO
addw(3),
absDiff(1),
signDiff(1),
multiply(1),
divide(1)
AUTHOR
Tor Lønnestad, BLAB, ifi, UiO
REVISED
Svein Bøe, Ifi, UiO. Implemented for all pixel types, notonly unsigned byte.
EXAMPLES
addw mona1.img mona2.img monaBoth.img
addw -w1 0.3 -w2 0.7 i1.img i2.img sum.img
ID
$Id: addw.c,v 1.36 1997/04/23 20:44:28 svein Exp $
Index
- NAME
- SYNTAX
- DESCRIPTION
- OPTIONS
- RESTRICTIONS
- SEE ALSO
- AUTHOR
- REVISED
- EXAMPLES
- ID
This document was created byman2html,using the manual pages.
