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https://issues.apache.org/jira/browse/TIKA-442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879515#action_12879515
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Jukka Zitting commented on TIKA-442:
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I'd go with XMP as much as possible. XMP leverages Exif for image metadata, and
the most relevant fields are probably:
tiff:ImageLength
tiff:ImageWidth
tiff:SamplesPerPixel
tiff:BitsPerSample
> Image extractors use inconsistent metadata keys and formats for common
> features
> -------------------------------------------------------------------------------
>
> Key: TIKA-442
> URL: https://issues.apache.org/jira/browse/TIKA-442
> Project: Tika
> Issue Type: Improvement
> Components: metadata, parser
> Affects Versions: 0.7
> Reporter: Nick Burch
> Priority: Minor
>
> Currently Tika has a number of parsers for image formats, but the way they
> return their data is inconsistent. For example:
> Jpeg: "Image Width" = "420 pixels", "Data Precision" = "8 bits"
> Gif: "width" = "420"
> Png: "width" = "420", "IHDR" = ".... bitDepth = 8 ....."
> Bmp: "width" = "420", "BitsPerSample" = "8 8 8"
> I think that the common keys, such as width and height, should be returned in
> a consistent format of key and value. If someone would like to suggest the
> namespace for this (maybe under XMDPM), and the short or long form (eg 420 vs
> 420 pixels), then I'm happy to work up a patch for this
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