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dchist(1) [debian man page]

DCHIST(1)						DICOM PS3 - DICOM image statistics						 DCHIST(1)

NAME

       dchist - ACR/NEMA DICOM PS3 ... DICOM PS3 - DICOM image statistics

SYNOPSIS

       dchist [ -h|histogram ] [ -csv ] [ -withhighbits|highbitsonly ] [ -v|verbose ] [ -filename ]

DESCRIPTION

       dchist  reads  the named dicom or acr-nema input file and describes the statistics of the image pixel data. The primary intent is to deter-
       mine the zero order entropy of the image.

       The description and verbose output go to standard error.

       The basic input switches are described in dcintro(1). Options specific to this program are:

       -h|histogram
	      Display table of pixel value, frequency, probability, contribution to zero order entropy, and cumulative	zero  order  entropy.  May
	      generate a LOT of output !

       -csv
	      Display only a comma separated value pair of pixel value and frequency, one line per value, e.g., for import into a statistical pro-
	      gram or spreadsheet

       -withhighbits
	      Include as well the values that are above Bits Stored and within Bits Allocated, such  as  might	be  overlay  bits  (regardless	of
	      whether or not there are any 60xx group elements).

       -highbitsonly
	      Use  instead  the  values  that  are above Bits Stored and within Bits Allocated, such as might be overlay bits, and treat all valid
	      pixel values below Bits Stored inclusive as zero (regardless of whether or not there are any 60xx group elements).

       -v|verbose
	      Display byte offset from file start and message start, in hexadecimal, and dump contents while reading and once read.

       -filename
	      Show the name of the file supplied in the arguments; a hyphen will be reported if no filename was supplied.

ENVIRONMENT


EXAMPLES


       % dchist expmeta.dc3
       9.02366 Zero order entropy (bits per pixel)
       0x0     Smallest symbol value
       0       Smallest symbol length (bits)
       0x6e9   Largest symbol value
       11      Largest symbol length (bits)

       % dchist -h expmeta.dc3
       [0x0]   392 p=0.00598145  e=0.0441747   cum=0.0441747
	...
       [0x6e9] 1   p=1.52588e-05 e=0.000244141 cum=9.02366

       9.02366 Zero order entropy (bits per pixel)
       0x0     Smallest symbol value
       0       Smallest symbol length (bits)
       0x6e9   Largest symbol value
       11      Largest symbol length (bits)

FILES


SEE ALSO

       dcstats(1), dcintro(1)

AUTHOR

       Copyright (C) 1993-2010. David A. Clunie DBA PixelMed Publishing. All rights reserved.

BUGS

DICOM PS3							  20 August 2007							 DCHIST(1)

Check Out this Related Man Page

DCSORT(1)					      DICOM PS3 - Make sorted list of images						 DCSORT(1)

NAME

       dcsort - ACR/NEMA DICOM PS3 ... DICOM PS3 - Make sorted list of images

SYNOPSIS

       dcsort  "  inputfile1  [ inputfile2 ... ]" [ -v|verbose ] [ -vv|veryverbose ] [ -vvv|veryveryverbose ] [ -index ] [ -show ] [ -interval ] [
		 -tolerance mm ] [ -check ] [ -checkFoR ] [ -descending ] [ -sortby|k  attributename ]

DESCRIPTION

       dcsort reads the named dicom input files and sorts them by the specified sort key.

       The sort key should be a single valued numeric attribute, with the exception of ImageOrientationPatient and ImagePositionPatient which  are
       handled as special cases.

       There is no output by default unless the index or verbose options are specified.

OPTIONS

       The output and errors go to standard error.

       The basic input switches are described in dcintro(1). Options specific to this program are:

       -index
	      Creates a first column of output that is the index in the sort order, starting from 0, and a second column that is the filename.

       -show
	      Show the value of the sort key after the file name with the -index option

       -interval
	      Show the interval between values of the sort key, or an error if not equal

       -tolerance mm
	      The tolerance value in mm to use when comparing intervals between slices; defaults to +/- 0.01 mm if unspecified

       -check
	      Check that all the images are from the same series.

       -checkFoR
	      Check that all the images have the same Frame of Reference (UID).

       -descending
	      Sort in descending, rather than the default ascending, order.

       -sortby|k  attributename
	      Specify attributename as the sort key.

ENVIRONMENT


EXAMPLES


       % dcsort -index -sortby SliceLocation ./1/[0-9]*
       0    ./1/1
       1    ./1/2

FILES


SEE ALSO

       dcintro(1)

AUTHOR

       Copyright (C) 1993-2010. David A. Clunie DBA PixelMed Publishing. All rights reserved.

BUGS

DICOM PS3							 22 December 2006							 DCSORT(1)
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