JPEGsnoop

JPEGsnoop is an application that examines and decodes the internal details of JPEG and MotionJPEG AVI files. It can also be used to analyze the image source and test its authenticity.

JPEGsnoop reports a huge amount of information including: quantization matrix tables (color and brightness), chroma oversampling , JPEG quality estimation, JPEG resolution settings, Huffman tables , EXIF metadata, Macro, RGB histograms, etc. In addition, you can enable full Huffman VLC decoding which will help those who are learning about JPEG compression.