The JPEG APP12 "Picture Info" segment was used by some older cameras, and
contains ASCII-based meta information.  Below are some tags which have been
observed Agfa and Polaroid images, however ExifTool will extract information
from any tags found in this segment.
| 
| Tag ID | Tag Name | Writable | Values / Notes | 
|---|
 
| 'Aperture' | Aperture | no |  |  
| 'ColorMode' | ColorMode | no |  |  
| 'ConTake' | ConTake | no |  |  
| 'ExpBias' | ExposureCompensation | no |  |  
| 'FNumber' | FNumber | no |  |  
| 'FWare' | FirmwareVersion | no |  |  
| 'Flash' | Flash | no | 0 = Off 1 = On
 |  
| 'FocusMode' | FocusMode | no |  |  
| 'FocusPos' | FocusPos | no |  |  
| 'ID' | ID | no |  |  
| 'ImageSize' | ImageSize | no |  |  
| 'LightS' | LightS | no |  |  
| 'Macro' | Macro | no | 0 = Off 1 = On
 |  
| 'Protect' | Protect | no |  |  
| 'Quality' | Quality | no |  |  
| 'Resolution' | Resolution | no |  |  
| 'Serial#' | SerialNumber | no |  |  
| 'Shutter' | ExposureTime | no |  |  
| 'StrobeTime' | StrobeTime | no |  |  
| 'TimeDate' | DateTimeOriginal | no |  |  
| 'Type' | CameraType | no |  |  
| 'Version' | Version | no |  |  
| 'Ytarget' | YTarget | no |  |  
| 'Zoom' | Zoom | no |  |  
| 'ZoomPos' | ZoomPos | no |  |  
| 'shtr' | ExposureTime | no |  |  
| 'ylevel' | YLevel | no |  |  | 
Photoshop uses the JPEG APP12 "Ducky" segment to store some information in
"Save for Web" images.
| 
| Tag ID | Tag Name | Writable | Values / Notes | 
|---|
 
| 0x0001 | Quality | int32u/ |  |  
| 0x0002 | Comment | string/ |  |  
| 0x0003 | Copyright | string/ |  |  | 
(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Jan 22, 2011
<-- ExifTool Tag Names