Image Exchange Format

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File Format
Name Image Exchange Format
Ontology
MIME Type(s) image/ief
Released 1992

Image Exchange Format is a subformat of TIFF, intended to be used for the transmission of bi-level images, especially fax images, over the (early) internet. Image Exchange Format is obsolete as a standard, though the format it defines is still a valid TIFF format.

It is defined in RFC 1314 as a subformat of TIFF Class B (which it calls TIFF-B). TIFF Class B is the bi-level TIFF subformat defined in the TIFF 5.0 specification.

It is not to be confused with Exchangeable image file format (Exif).

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