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HOUGHLINE
Section: User Commands (1)
Updated: 16 Mar 1998
Index
NAME
houghLine - Hough transform for line detection
SYNTAX
houghLine [<option>...] <inimage>
DESCRIPTION
Performs a Hough transform to detect lines. Every band in theinput image
inimageis transformed to a two dimensionalHough space, a (theta, rho) space.
After creating the transform, the Hough space may be searchedfor local maxima. Within each band, only the largest localmaximum (maxima) within a wsxwsarea is registered.Besides, only maxima with number of updates above a limitgiven by the -ul option are used. A list of these maxima may bewritten to stdout, depending on the options given.
OPTIONS
- -list
- Print a list of maxima to stdout. Default: Don't.
- -tf transformFileName
- Save the transform to transformFileName.Default: Don'tsave.
- -rf reconstructionFileName
- The Hough-space maxima are used to reconstruct the image,and the image is written to reconstructionFileName.Default: Don't reconstruct and save.
- -tt transformTitle
- Use transformTitleas title for transformed image.Default: "Hough Line Transform".
- -rt reconstructionTitle
- Use reconstructionTitleas title for reconstructed image.Default: "Hough Line Reconstruction".
- -ul updateLimit
- This determines the minimum number of updates for a maximumto be used. The minimum number is determined from updateLimitand the size of the hough space image:
updateLimit * MAX(horizontal size, vertical size)
Default: 0.1.
- -ws windowSize
- Default: 7.
RESTRICTIONS
inimagemust have bands with pixel type unsigned byte.
SEE ALSO
houghCircle(1)
AUTHOR
Tor Lønnestad, BLAB, Ifi, UiO
EXAMPLES
houghLine -tf monaHT.img -rf monaRF.img -ul 0.2 mona.img
ID
$Id: houghLine.c,v 1.30 1997/03/07 12:52:01 svein Exp $
Index
- NAME
- SYNTAX
- DESCRIPTION
- OPTIONS
- RESTRICTIONS
- SEE ALSO
- AUTHOR
- EXAMPLES
- ID
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