MHISTO

Section: User Commands (1)
Updated: FEBURARY 13, 1991
Index Return to Main Contents
 

NAME

mhisto - compute grey-level histogram for any file  

SYNOPSIS


mhisto [-l #] [-c] [-m #] [-b # -n #] [-f -t] [-M] [-r -R] [-z] [-s #]
          [-a -1 -2 #] [-S[#]] [<] input [> [-o]outhist]
 

DESCRIPTION

-l #
log(bins) is the log2 of the number of bins. The default is 8 (bins=256).
-c
causes multiple frame sequences to collapse to a single histogram, instead of a separate histogram being generated for each input frame. It can be used to compute a 3D image histogram.
-m #
specify the maximum output value. The maximum integer input is 21TP -b # begin processing with the #'th frame. The default is 1.
-n #
process # frames.
-f -t
will eliminate the frequent top or zero value count.
-r
recalculate maximum count for each frame (with this option, -R should be used in mdisphist to retrieve these counts.
-s #
set display scale (maximum count) for the entire histogram.
-S[#]
smooth the histogram for analysis purposes. small value gives less smoothing. The default = 5 (range in 1 - 17).
-z
count zeros. The default is to eliminate zero values.
-12a #
compute histogram for any file (ascii, binary...) with file size # in byte. mhisto treats input as byte (-a), short (-1), or long integer (-2).
-M
display some important status messages.
 

EXAMPLE

mhisto bird | powertool (-a > bird.hg, | lpr)
generate gnuplot data (-a), or print the histogram table.

mhisto MRI_3D.256 -b 10 -n 5 -r -S 2 | mdisphist -R | tuner
extract frame number 10 to 15 from a 256 frame 3D MRI image, calculate maximum pixel number for each frame, and use smoothing algorithm to generate histogram graphs.  

NOTE

         see ccs.n for input image types

The output is a Histogram data.  

SEE ALSO

mdisphist(1), histo_simulate(1), powertool(1)  

AUTHOR

Jin Guojun, LBL - 1/8/91


 

Index

NAME
SYNOPSIS
DESCRIPTION
EXAMPLE
NOTE
SEE ALSO
AUTHOR

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