[jira] Commented: (TIKA-442) Image extractors use inconsistent metadata keys and formats for common features

["Jukka Zitting (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TIKA-442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879515#action_12879515 ] 

Jukka Zitting commented on TIKA-442:
------------------------------------

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

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.