NAME:

 pansharpen

DESCRIPTION:

 This C/C++ program is meant to pansharpen a set of 4 
 one-band Geotiff files holding low-resolution imagery for 
 a set of NIR, red, green, and blue bands. This is done by 
 resampling this imagery using bicubic resampling and applying 
 the Brovey and FIHS image pan-sharpening algorithms and 
 transformations. Imagery provided by a 1 band panchromatic Geotiff 
 image file are also necessary. 

INPUTS:

 Data from five 1-band Geotiffs are necessary to run this program.
 These Geotiffs are a panchromatic image file (high-res.) and the 
 Geotiffs holding pixel data for the red, green, blue, and NIR bands.
 These 1-band files should contain 2-byte unsigned integer 
 ("short" data-type in C) pixel array data. 

OUTPUTS:

 Two 4-band Geotiff image files holding the pan-sharpened image bands 
 for the pan-sharpened red, green, blue, and NIR bands. Their geotransform 
 and projection information reflects the input panchromatic Geotiff image
 file passed-in. One 4-band output file is a result of using the Brovey 
 transform pan-sharpening, and the other using the Fast Intensity Hue 
 Saturation pan-sharpening technique (FIHS).

INSTRUCTIONS:

 In makefile, be sure to update the directory strings as appropriate 
 for your computer. These directory strings should reflect the 
 installation location of your GDAL header (.h) and library (.a) files. 

USAGE:

$ make 
$ ./pansharpen  
 (1) <PANCHROMATIC_GEOTIFF>{.tif} 
 (2) <NIR_GEOTIFF>{.tif} 
 (3) <RED_GEOTIFF>{.tif} 
 (4) <GREEN_GEOTIFF>{.tif} 
 (5) <BLUE_GEOTIFF>{.tif}

EXAMPLE USAGE:

 $ ./pansharpen pan.tif NIR.tif red.tif green.tif blue.tif 

AUTHOR:

 Gerasimos "Geri" Michalitsianos
 [email protected]
 SGT, Inc. 
 March 2018 

EXAMPLE OUTPUT IMAGES:

    Original (RGB) & pan-sharpened (RGB,NIR) Landsat 8 imagery, Argostoli, Kefalonia, Greece.