Extract Huffman Table Content From a JPEG Image

Question

I'm new to JPEG / image compression. Basically I want to view / extract the content(bytes) of Huffman Table embedded inside a JPEG file.

Answer 1

There are two steps.

1. You have to read the data from a DHT market. The structure is defined in the JPEG standard.

That gives you an array of counts--the number of codes of a given length.

2. You have to convert the counts to huffman codes.

The JPEG standard explains that process.