Name:    ImgEnhance.exe
Purpose: Improve image quality of ALOS PRISM image.
Target:  ALOS PRISM level 1B1 product.
OS:      Windows (DOS window) (Developed and checked on XP Professional SP2)
CPU:     Pentium or later (almost any x86/x64 CPUs)

Command Line:   ImgEnhance <product-dir> <id> [<options> [<out-dir>]]
            ex. ImgEnhance D:\Products\Somewhere\N ALPSMN031072925-O1B1___N
  <product-dir> directory name where the PRISM product exists
  <id>          common part of the PRISM product file name
  <options>     one or more option character[s] below
    n  no radiometric correctio between odd/even pixel, and between CCDs
    j  no JPEG noise reduction
    g  radiometric correctio between odd/even pixels, and between CCDs by gain-offset model (defualt is by histogram matching)
    d  dump radiometric correction table
    k  keep original image files as (file name).org
    o  outputs image files to directory <out-dir>
    t  outputs execution time to STDOUT
  <out-dir>     output directory name, if "o" option is specified

Files:
(1) Common
    <product-dir>\VOL-<id> (input) Volume directory file, standard product
    .\<id>.rct.txt         (output) Radiometric correction table (if "d" option is specified)
(2) Default (without "o" option and without "b" option): overwrite
    <product-dir>\IMG-0*-<id>     (overwrite) Image file, standard product, enhanced by the execution
    <product-dir>\IMG-0*-<id>.tmp (temporary file)
(3) With "o" option: create new file
    <product-dir>\IMG-0*-<id>     (input) Image file, standard product
    <out-dir>\IMG-0*-<id>         (output) Enhanced image file, standard product
(4) Without "o" option and with "b" option: backup
    <product-dir>\IMG-0*-<id>     (overwrite) Image file, standard product, enhanced by the execution
    <product-dir>\IMG-0*-<id>.tmp (temporary file)
    <product-dir>\IMG-0*-<id>.org (output) Backup of <product-dir>\IMG-0*-<id>