... additional information. For most pictures, only four segmenttypes are of importance: Start Of Frame (SOF), Dene Human Table (DHT), Dene Quantiza-tion Table (DQT), and Start Of Scan (SOS ... knowledge of JPEG or any of its algorithms, nor of specialized functionalprogramming techniques. Basic knowledge of functional programming (recursion, manipulation of lists and the use of types, ... long sequences of zeroes, especially at the end if thelist (bottom-right of the matrix) of coecients. The function dequant belowtakes a list of 64quantization factors and a list of 64 quantized...