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JPG/JPEG File Format for Pictures
What is JPG/JPEG file format?
✍: FYIcenter.com
JPG or JPEG is a short name for Joint Photographic Experts Group, which is a very popular encoding format for storing pictures. JPEG was developed by the Joint Photographic Experts Group committee in 1992, and approved as ISO standard, ISO 10918-1, in 1994.
JPG or JPEG is the file extension for files encoded in JPEG format.
JPEG encoding consists of 5 steps as described at wikipedia.org:
Here are the first 64 bytes of a sample JPEG file dumped in HEX values:
ff d8 ff e0 00 10 4a 46 49 46 00 01 01 01 00 60 ......JFIF...... 00 60 00 00 ff e1 31 af 45 78 69 66 00 00 49 49 ......1.Exif..II 2a 00 08 00 00 00 12 00 0e 01 02 00 20 00 00 00 ................ e6 00 00 00 0f 01 02 00 05 00 00 00 06 01 00 00 ................
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