RLE

this programme uses run length encoding to compress images and decompress images. It also comes with support for creating new image files using the pbm file format.

How to use

Clap Help Message

Usage: rle [OPTIONS] --input-file <INPUT_FILE> --output-file <OUTPUT_FILE>

Options:
  -i, --input-file <INPUT_FILE>    
  -o, --output-file <OUTPUT_FILE>  
  -d, --decode                     
  -e, --encode                     
  -s, --save-image                 
  -w, --width <WIDTH>              
  -h, --help                       Print help
  -V, --version                    Print version

how it works

RLE

This program uses run length encoding (RLE), this is a form of lossless compression. It takes a string of 1's and 0's from a text file and uses the rust file system to compress these into a shortened sequence.

It compresses these into a series of numbers with commas inbetween. This program assumes that the values start at 1 before flipping.

This program can also decompress the files it creates back into the originial input this can be checked by running these commands in the console.

diff inputfile outputfile

diff pattern.txt output.txt

if the program has run correctly there should be no output to the console.

Creating Images

for creating images the .pbm file format. For this file format there is a header that contains a comment the type (ascii or binary), the dimensions of the image. The content uses an string of 1's represeting black and 0's represeting white seperated by a space