JEITA CP-3451
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4.6.3 Exif-specific IFD
A. Exif IFD
Exif IFD is a set of tags for recording Exif-specific attribute information. It is pointed to by the offset from the TIFF
header (Value Offset) indicated by an Exif private tag value.
Exif IFD Pointer
Tag
= 34665 (8769.H)
Type
= LONG
Count
= 1
Default
= none
A pointer to the Exif IFD. Interoperability, Exif IFD has the same structure as that of the IFD specified in TIFF.
Ordinarily, however, it does not contain image data as in the case of TIFF.
B. GPS IFD
GPS IFD is a set of tags for recording GPS information. It is pointed to by the offset from the TIFF header (Value
Offset) indicated by a GPS private tag value.
GPS Info IFD Pointer
Tag
= 34853 (8825.H)
Type
= LONG
Count
= 1
Default
= none
A pointer to the GPS Info IFD. The Interoperability structure of the GPS Info IFD, like that of Exif IFD, has no image
data.
C. Interoperability IFD
Interoperability IFD is composed of tags which stores the information to ensure the Interoperability and pointed by
the following tag located in Exif IFD.
Interoperability IFD Pointer
Tag
= 40965 (A005.H)
Type
= LONG
Count
= 1
Default
= None
The Interoperability structure of Interoperability IFD is same as TIFF defined IFD structure but does not contain the
image data characteristically compared with normal TIFF IFD.