ELASTIC

Section: User Commands (1)
Updated: JANUARY 15, 1991
Index Return to Main Contents
 

NAME

elastic - high performance image enhancement tool  

SYNOPSIS


elastic [-v#] [-b] [-n] [-r] [<] inputfilename [> [-o] filename]
          [-f#] [-g[#]] [-B -F] [-a[#]] [-e [-z]] [-l] [-t]
          [-I] [-R[X, Y] #] [-S] [-M] [-T]
 

DESCRIPTION

elastic is a histogram streching based image enhancement tool using elastic algorithm. The ELASTIC function basically performs 3 different intensity corrections:
(1) recoverable scaling (saturated elastic-tuning, by default)
(2) S correction (-f # = -425 to +275, -325 to 0 is unsaturated elastic-tuning)
(3) C correction (supersaturated non-saturated elastic-tuning)
Also elastic can perform region difference interpolation and high frequencies emphasis.
The input can be one type of HIPS, FITS, GIF, ICC, RLE, PNM, SUN-Raster, and TIFF images, and the output is a HIPS image.  

OPTIONS

-a[#]
adjust float input automatically. The following # yields output range factor. The default is 196.
-b
use elastic-tuning to emphasize background. The default is to emphasize the foreground.
-f #
scale factor, real number in percentage. The default is 0%. (often used range is from -575 to +750.) (The entire range can be from -10550 to +12500.)
-g[#]
the base value (threhsold) at bottom, no output value will be less than it. If -g specified but no further value given, the default base = 10.
-l
linear scaling. Usually work with RDI (region difference interpolation).
-n
negative elastic operation.
-r
relaxed elasticity operation, for Fast Version only (see version by using -M). -t[#] clip top # (default=1) value to 91%(default) or given value # (in -v).
-v #
set maximum value for output.
-B
force byte formated output. The default is to output images same as input.
-F
force floating point format output.
-E
modify Edges on right and bottom when interpolating.
-I
Interpolation in main peak area for BYTE formated output, [2 x 2] regions.
-R
interpolation Regions for both X and Y. For BYTE format images only.
-RX #
X interpolation regions. -RY # Y interpolation regions.
-S
treat all slices as a single 3D image.
-M
Display messages.
-T
generate Table for plot
-o
this option is used for machines such as the PC which require binary output file modes to be set on open. No space allowed between the switch and the filename.
-e
emphasize the high frequencies.
-z
option counts zero valued pixels in high frequency emphasis (-e).
 

NOTE

Input can be any format, and floating point input can only result in either byte or floating point output.  

EXAMPLE

elastic -f 250 -b -R 8 bird.h | xhips  

SEE ALSO

meanpeak(1), mean_scale(1)  

AUTHOR

Jin Guojun - 1/3/90


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
NOTE
EXAMPLE
SEE ALSO
AUTHOR

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