EXIF tag · InteropIFD

InteropIndex

The InteropIndex tag stored in the InteropIFD directory.

0x0001
Tag ID (1 decimal)
InteropIFD
IFD / group
string!
Data type
EXIF
Table

What InteropIndex means#

The InteropIndex tag stored in the InteropIFD directory.

Defined values#

ValueMeaning
'R03'R03 - DCF option file (Adobe RGB)
'R98'R98 - DCF basic file (sRGB)
'THM'THM - DCF thumbnail file

Read, write and remove it#

# read
exiftool -InteropIndex photo.jpg
# write
exiftool -InteropIndex="…" photo.jpg
# remove
exiftool -InteropIndex= photo.jpg
# all files in a folder, as CSV
exiftool -csv -InteropIndex -r ./photos > interop-index.csv

In Python with Pillow:

from PIL import Image
exif = Image.open("photo.jpg").getexif()
value = exif.get_ifd(0xA005).get(0x0001)  # InteropIndex
print(value)

Other InteropIFD tags#

Frequently asked questions#

What is the EXIF tag ID of InteropIndex?

0x0001 (1 decimal), in the InteropIFD directory.

How do I see InteropIndex in a photo?

Run exiftool -InteropIndex photo.jpg, or open the file's info panel in Lightroom, Photoshop, Windows (Properties → Details) or macOS Preview (Tools → Show Inspector).

Last updated October 03, 2026 · How we calculate · Sources