TIFF Version Config to Include TIFF/EP?

[blue-j]

I was curious if it would make sense to expand the TIFF version config to include recognition of TIFF/EP, the ISO spec succeeding v6?  There are a number of fields unique to that specification:

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            # TIFF/EP
                41 => 'EXIF:CFARepeatPatternDim', # CFARepeatPatternDim (0x828d)
                42 => 'EXIF:CFAPattern', # CFAPattern (0xa302)
                43 => 'EXIF:Interlace', # Interlace (0x8829)
                44 => 'EXIF:TimeZoneOffset', # TimeZoneOffset (0x882a)
                45 => 'EXIF:SelfTimerMode', # SelfTimerMode (0x882b)
                46 => 'EXIF:FlashEnergy', # FlashEnergy (0x920b)
                47 => 'EXIF:Noise', # Noise (0x920d)
                48 => 'EXIF:ImageNumber', # ImageNumber (0x9211)
                49 => 'EXIF:SecurityClassification', # SecurityClassification (0x9212)
                50 => 'EXIF:ImageHistory', # ImageHistory (0x9213)
                51 => 'EXIF:TIFF-EPStandardID', # TIFF-EPStandardID (0x9216)
            },
Shortcut attempt:

Code Select Expand

    TiffVersionEPTags => [
'EXIF:CFARepeatPatternDim', 'EXIF:CFAPattern', 'EXIF:Interlace',
'EXIF:TimeZoneOffset', 'EXIF:SelfTimerMode', 'EXIF:FlashEnergy', 'EXIF:Noise',
'EXIF:ImageNumber', 'EXIF:SecurityClassification', 'EXIF:ImageHistory',
'EXIF:TIFF-EPStandardID',
    ],
Anyone game?  I tried to give an alley oop to the best of my ability...

- J

[Phil Harvey]

Maybe StarGeek remembers the original reason for creating the tiff_version.config file.  I can't say whether adding TIFF/EP would be useful.

But the SaveFormat API option is now documented, so I will at least change the comment at the end of the file.

- Phil

[StarGeek]

Maybe StarGeek remembers the original reason for creating the tiff_version.config file.  I can't say whether adding TIFF/EP would be useful.

Here's the original thread.  I can't comment beyond that.  Barely even remember working on it.

[blue-j]

It's definitely useful to my user community (post production professionals). We are also looking at providing an educational platform, so we have all kinds of references, specs, etc.

I've attached all I can do.  I just don't know how to write Perl loops.  - J

tiff_version_EP_draft.config

[blue-j]

I think maybe I got it?

- J

[blue-j]

Corrected - both EXIF:FlashEnergy and EXIF:CFAPattern are part of the EXIF namespace and not unique to TIFF/EP.

- J

[Phil Harvey]

Where did you get the list of tags added by the TIFF/EP specification?  I've looked at the specification itself and I can't see a clear list of changes.

- Phil

[blue-j]

It starts with this, ISO 12234-2:2001, p V:

In this part of ISO 12234, references to tags and tag values defined in TIFF 6.0 are shown in bold typeface. Tags and tag values that are not defined in TIFF 6.0 are identified in italic type face.

Then when you follow down to the table on page 13 (as printed), you find a more precise account, where you have to follow the superscript legend at the bottom of the table.  Following that logic, any tag without a superscript should be fully unique to TIFF/EP.

I did find two exceptions - CFAPattern and FlashEnergy, both of which I see in EXIF 2.32; however, at the time of writing the ISO standard it seems EXIF was at 2.1... so that is the cause, or it's human error, or I'm out to lunch?

There you go, that was my thinking.

- J