about canonical huffman tables.

I'm working on image compression, I need to use the canonical huffman tables.

Is there any algorithm to generate them?

Answer 1

[arushi]

Hi Lou,

Steps to Generate Canonical Huffman Tables

Generate the Huffman Tree:

• Calculate the frequency of each symbol in the input data.
• Build the Huffman tree based on these frequencies.
• Generate the initial Huffman codes from the tree.

Calculate Code Lengths:

• Determine the length of each Huffman code generated in the previous step.

Sort Symbols by Code Length and Lexicographically:

• Sort the symbols primarily by the code length and secondarily by the symbol value.

Generate Canonical Huffman Codes:

• Assign the shortest code to the first symbol in the sorted list.
• Incrementally assign codes to the subsequent symbols, ensuring that each code is lexicographically greater than the previous one.

Hope this helps.