## 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