is EXIF a superset of JFIF

Discussion in 'Photography' started by camera_dude, Jul 7, 2008.

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  1. camera_dude

    camera_dude Member

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    Hello,


    My understanding is that the JFIF is the most basic of JPEG images and that funcionally the EXIF is a superset of JFIF, is that correct?


    I came across the following article which states that an image can either be JFIF or EXIF, is this correct?

    "
    Strictly speaking, the JFIF and Exif standards are incompatible because they each specify that their header appears first. In practice, most JPEG files in Exif format contain a small JFIF header that precedes the Exif header. This allows older readers to correctly handle the older format JFIF header, while newer readers also decode the following Exif header.
    "
    ref: http://wapedia.mobi/en/JPEG?t=4.
     
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