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Huffman Coding Huffman coding is a lossless data compression algorithm. The idea is to assign variablelength codes to input characters; lengths of the assigned codes
Huffman Coding
Huffman coding is a lossless data compression algorithm. The idea is to assign variablelength codes to input characters; lengths of the assigned codes are based on the
frequencies of corresponding characters. The most frequent character gets the smallest
code and the least frequent character gets the largest code.
The variable
length codes assigned to input characters are Prefix Codes, means the codes
bit sequences
are assigned in such a way that the code assigned to one character is not
prefix of code assigned to any other character. This is how Huffman Coding makes sure
that there is no ambiguity when decoding the generated bit stream.
In this project, you will be using a priority queue and a binary tree of your design to
implement a file compression
uncompression algorithm called "Huffman Coding".
Your program will read any file and compress it using your implementation of the
Huffman coding algorithm found in the explanation. The compressed data will be written
to a file. That compressed file will be then be read back by your program and
uncompressed. The uncompressed file will then be written to a third file. The
uncompressed file should of course match the original file.
Summary of Processing
Read the specified file and count the frequency of all bytes in the file.
Create the Huffman coding tree based on the frequencies.
Create and display a table of encodings for each byte from the Huffman coding
tree.
Encode the file and output the encoded
compressed file.
Display the header that include the huffman code.
Read the encoded
compressed file you just created, decode it and output the
decoded file Using java
Note : Don't use buil
in classes and HashMap
Just MinHeap, The header inside the compressed file
huf
must include file extension and the header size and huffman code write Full Code Complete Code to be rewady for run
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