This program supports lossless compression of 
PPM format RGB images with 8 bits per channel. 
For PPM format, the header information
starts with a single line in plain-text format:

P6 cols rows maxval

The header is followed by cols times rows triplets of symbols, 
where each symbol in a triplet represents a RGB value, 
in binary format.

If the PPM file includes any comments in the header section
and/or the header section is written as three lines, please use
PPM_Converter.exe before BWIC_I.exe to convert the image file.

USAGE:

    - PPM_Converter.exe inputfile outputfile

        inputfile     : input file must be in PPM format
        outputfile    : output file in PPM format 
                        after removing the comments in header of PPM
                        file and converting the header section.

    - BWIC_I.exe MODE_FLAG inputfile outputfile
    
        MODE_FLAG:
        -e            : performs compression
        -d            : performs decompression    
      
        inputfile     : input file must be in PPM format
        outputfile    : compressed output file
    

        
EXAMPLE:

    The header of kodak01.ppm file:
    
    P6 768 512 255

    P6: 3 components image
    768: Number of columns
    512: Number of rows
    255: Maximum color value in each channel

    To compress kodak01.ppm image file:
       BWIC_I.exe -e kodak01.ppm kodak01.bwici

    To decompress kodak01.bwici file:
       BWIC_I.exe -d kodak01.bwici kodak01.ppm

NOTES: 

- This program supports compression and decompression 
a single PPM image file at a time.

- Header must be a single line in ASCII format. In some images,
the header may come in three lines; in this case, header first needs to be
converted into single line form before processing.

- It has been tested on Microsoft Windows 10 x64.     

- The link for PPM images:
http://www.cs.fredonia.edu/~arnavut/research/BWIC_I/