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GLRUNLENGTH
Section: User Commands (1)
Updated: 16 Mar 1998
Index
NAME
glRunLength - Grey value distribution of run lengths
SYNTAX
glRunLength [<option>...] <inimage>
DESCRIPTION
The run length statistics can be used to extracttexture information of an image from its grey levelruns. Consecutive pixels of the same grey value,in a given direction (either horizontal or vertical),constitute a run. The numbers of runs of differentlengths and grey values, arranged according to thelengths and grey levels, form a 2-D matrix calledgrey level run length matrix.
There are two possible directions to scan the image, eitherhorizontal or vertical directions. The average of these twodirections also can be chosen (option -aver).
Several features can be extracted from this matrix, using theoptions described below. If you don't specify any options forfeatures, then the program will compute all the parameters.
OPTIONS
The first seven options are for the features which can beextracted from the GLRL matrix.
- -sre
- Short Run emphasis
- -lre
- Long Run emphasis
- -gln
- Grey Level Nonuniformity
- -rln
- Run Length Nonuniformity
- -rp
- Run Percentage
- -sgre
- Low Grey Level Run emphasis
- -lgre
- High Grey Level Run emphasis
- -h
- A header for the output is wanted.
- -hori
- Horizontal direction
- -vert
- Vertical direction
- -aver
- Consider both directions and take the average of them.(Default direction options is -hori.)
- -heq
- Histogram equalization of the input image.
- -o filename
- Run length matrix will be saved as an image in filename.
-qlevels quantization_levelsNumber of grey levels in the input will be grouped intogiven number of quantization levels. Default is 256.
RESTRICTIONS
inimagemust have bands with pixel type unsigned byte.
SEE ALSO
glcm(1),
glcmParameter(1)
AUTHOR
Yogesan, BLAB, Ifi, UiO
EXAMPLES
glRunLength mona.img
glRunLength -h mona.img
glRunLength -h -sre -rp -gln mona.img
glRunLength -h -sre -o mona.out mona.img
glRunLength -h -sre -o mona.out mona.img -qlevels 16
glRunLength -h mona.img -qlevels 32
glRunLength mona.img -aver
ID
$Id: glRunLength.c,v 1.27 1997/03/07 12:52:20 svein Exp $
Index
- NAME
- SYNTAX
- DESCRIPTION
- OPTIONS
- RESTRICTIONS
- SEE ALSO
- AUTHOR
- EXAMPLES
- ID
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