JFIF Tags

The following information is extracted from the JPEG JFIF header. See https://www.w3.org/Graphics/JPEG/jfif3.pdf for the JFIF 1.02 specification.

Index1 Tag Name Writable Values / Notes

0 JFIFVersion no:

2 ResolutionUnit int8u: 0 = None
1 = inches
2 = cm

3 XResolution int16u:

5 YResolution int16u:

7 ThumbnailWidth no

8 ThumbnailHeight no

9 ThumbnailTIFF no (raw RGB thumbnail data, extracted as a TIFF image)

JFIF Extension Tags

Thumbnail images extracted from the JFXX segment.

Tag ID Tag Name Writable Values / Notes

0x0010 ThumbnailImage no (JPEG-format thumbnail image)

0x0011 ThumbnailTIFF no (raw palette-color thumbnail data, extracted as a TIFF image)

0x0013 ThumbnailTIFF no (raw RGB thumbnail data, extracted as a TIFF image)

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Jul 21, 2017

<-- ExifTool Tag Names