Level 2 Help for ENTROPY

STRING - The input image filename.  The file may be either byte or
halfword format.

INTEGER - (SL,SS, NL,NS)-4 values specifying the area of the image to process.
        where
                SL = starting line of the image area
                SS = starting sample of the image area
                NL = number of lines in the image area
                NS = number of samples in the image area

STRING-optional output file name for the normalized difference histogram.

KEYWORD-controls whether or not a histogram of the differences between
adjacent pixels is printed to the screen.  Note: This requires a 132 column
display.

KEYWORD-will cause differences having zero frequencies to be included in the
printout (normally these are excluded).  Note:  This keyword does not affect
the data written to the distribution file specified by the DISTFILE parameter.

KEYWORD - Indicates whether to put the entropy value into the
frame's label.  Valid values are LABEL and NOLABEL.  NOLABEL is the
default.

REAL - The name of the TCL variable to contain the entropy value.