Canon IXUS/ELPH/IXY - Firmware version advice

[ImpulseAdventure]

I would have thought that fingerprinting may benefit from considering the firmware version of the camera.
For my Canon IXUS 220HS** this information is not presented

**aka "ELPH 3000" [usa] ... aka "IXY DIGITAL 410F" [japan]

EXIFTool by Phil Harvey : http://owl.phy.queensu.ca/~phil/exiftool/
...can be run as: exiftool IMG_1234.jpg -MakerNotes:FirmwareRevision
...which will return something like: Firmware Revision: 1.01 rev 4.00
...which means Canon Firmware v1.01d {rev1.00->a, rev2.00->b, ...}
As EXIFTool is written in PERL, this should be easy to implement
...or alternatively, do what the CHDK (Canon Hacker's Dev Kit) did with : http://chdk.wikia.com/wiki/CameraVersion
...and simply shell out to exifinfo

I have submitted a 'signature' for a single "fine" (resolution) image ...I can provide more data if requested

[2012/01/13] First created at https://sourceforge.net/p/jpegsnoop/feature-requests/44/ by Blue Chip

[ImpulseAdventure]

[2012/01/13] From Blue Chip:
First off I correct myself with "firmware REVISION" not "version" as I erroneously typed previously.

MakerNotes for (all?) Canon Cameras: http://owl.phy.queensu.ca/~phil/exiftool/makernote_types.html
-> http://owl.phy.queensu.ca/~phil/exiftool/TagNames/Canon.html
..suggests it is Note 0x1E
A quick check on a random photo shows that note 1E does contain the the firmware revision, but the value is not a simple uint32 (little-endian)
...Instead what I see is: [1E], [00, 04, 00, 01, 00, 00, 00], [00, 04, 01, 01]
...what the 7 bytes are after the 1E is anybodies guess :/
...Maybe it's : [1E, 00], [04, 00], [01, 00, 00, 00], [00, 04, 01, 01]
...tag 001E; 0004 bytes; ; 4-byte revision number (1.01 rev 4.00)

Anyway I hope this helps you in some way :/