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Welcome to Episode 2 of Everything You Need to Know About JPEG. Last episode, we did an overview of the process of JPEG compression - going from raw pixel data into the compressed bitstream that ends up in a JPEG file. Now we will be focusing on decoding a JPEG file that is already compressed. Last episode, we talked about three things that we know we will have to read from the JPEG file. That is: the quantization tables, the Huffman tables, and the Huffman coded bit stream. Those are the three that we mentioned. There are a couple others that we will discover. But in this episode we will read each of these things out of a JPEG file that we will be testing with, store all of this information, and at the end print it all out to the terminal. And that way we can verify the correctness of our program. First things first, how do we know what to read next out of a JPEG file? JPEG files use what are called markers. These are two byte values that indicate, based on their value, the type of d