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Posted to issues@commons.apache.org by "Xavier Dury (JIRA)" <ji...@apache.org> on 2013/09/17 11:12:03 UTC

[jira] [Updated] (IMAGING-112) JpegIptcRewriter.removeIPTC() does not remove all metadata

     [ https://issues.apache.org/jira/browse/IMAGING-112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xavier Dury updated IMAGING-112:
--------------------------------

    Attachment: ImageTest.java

Included a test case
                
> JpegIptcRewriter.removeIPTC() does not remove all metadata
> ----------------------------------------------------------
>
>                 Key: IMAGING-112
>                 URL: https://issues.apache.org/jira/browse/IMAGING-112
>             Project: Commons Imaging
>          Issue Type: Bug
>    Affects Versions: 1.0
>            Reporter: Xavier Dury
>         Attachments: ImageTest.java
>
>
> I'm trying to compute hashes from my images to detect duplicates.
> To do so, I strip every metadata (like keywords I may have added) then compute a CRC32.
> My problem is that JpegIptcRewriter.removeIPTC() does not remove all metadata as there is always a difference of 18 bytes (containing "Photoshop 3.0").
> So could it be possible to remove those 18 bytes as well in removeIPTC() so that I can compute hashes?
> Thanks,
> Xavier

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