window
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Name
window - Make a BIFF image containing a window function
Syntax
window [<option>...] <outimage>
Description
Make a BIFF image containing a circularly symmetric window
function.
The window is returned with its center in the center of
the image. To be applied to an image-domain filter, make sure
that also the filter-function is centered around the image
center. If the filter-function is centered around an image
corner, the window must be shifted before it can be applied.
Options
-
-w type
- Specifies the window type. Legal values are
-
"r" or 0
- Circularly symmetric rectangular window.
-
"b" or 1
- Circularly symmetric Bartlett window.
-
"hm" or 2
- Circularly symmetric Hamming window.
-
"hn" or 3
- Circularly symmetric Hanning window.
-
"t" or 4
- Circularly symmetric triangular window.
Default: Hamming window.
-
-x xsize
- Horizontal size of output image. Default: 512.
-
-y ysize
- Vertical size of output image. Default: 512.
-
-s window_size
- Diameter of window function. Default: xsize/2.
-
-t title
- Title of image. Default: "Window".
See also
window(3), bartlett(3), lowpass(1)
Author
Svein Bøe, Blab, Ifi, UiO
Id
$Id: window.c,v 1.21 1997/05/27 13:23:15 svein Exp $