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dchist - Online in the Cloud

Run dchist in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command dchist that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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 determine 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 program 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)

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