Jpeg extractor
jpeg_extract <filename>
jpeg_extractor is used by fiwalk, provided by TSK (The Sleuth Kit) to manipulate JPG files.
The Sleuth Kit was written by Brian Carrier <[email protected]>. This manual page was written by Joao Eriberto Mota Filho <[email protected]> for the Debian project (but may be used by others). The fcat help page was the source.