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https://issues.apache.org/jira/browse/IMAGING-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16283314#comment-16283314
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Bruno P. Kinoshita commented on IMAGING-205:
--------------------------------------------
{quote}Regarding the code snippet I posted earlier, about writing the
UserComment
field. I had to do quite a bit of manual work to ensure adhering to the
Exif specification. Should some of this perhaps be incorporated into the
library?{quote}
I am not sure when/where users would want to use it, but only because I am
slowly understanding the code base, and for TIFF/EXIF, I don't really have much
practical use (my use case is more properly handling images for IIIF, and in
getting a release of Imaging out of the door so I can experiment imaging with
Cantaloupe image server).
But I assume it would be a different issue? If you could create a new issue,
explaining the use case for that, and where you think it should go in Imaging,
I'd be more than happy to review it.
Thanks Joakim!!!
Bruno
> Imaging (Apache Sanselan) produces "odd offsets" in (EXIF) metadata
> -------------------------------------------------------------------
>
> Key: IMAGING-205
> URL: https://issues.apache.org/jira/browse/IMAGING-205
> Project: Commons Imaging
> Issue Type: Bug
> Components: imaging.*
> Reporter: Joakim Knudsen
> Assignee: Bruno P. Kinoshita
> Priority: Critical
> Fix For: 1.0
>
> Attachments: 20171030_214812.jpg, 20171030_214812_copy_desktop.JPG,
> 20171030_21481_COPY.jpg, DSC_3338.JPG, DSC_3338_imaging_205.JPG,
> DSC_3338_imaging_205_UC.JPG, DSC_5506.JPG, DSC_5506_copy_desktop.JPG,
> Gaboxjellyfish-changedexifmetadata.jpg, Gaboxjellyfish.jpg, Samsung Note 8
> Android.jpg, after.html, before.html
>
>
> I'm using the "last stable version" of Apache Sanselan 0.97 in an Android
> project (app). I have not upgraded to Commons Imaging yet, since the website
> says there is no stable release yet. Meanwhile, there are bugs in Sanselan.
> If I run the [sample code method
> WriteExifMetadataExample.changeExifMetadata|http://svn.apache.org/repos/asf/commons/proper/sanselan/trunk/src/test/java/org/apache/sanselan/sampleUsage/WriteExifMetadataExample.java?p=820841]
> on an image, which updates the Apterture and GPS tags, the resulting image
> fails to validate (through Phil Harvey's [ExifTool
> software|https://sno.phy.queensu.ca/~phil/exiftool/]):
> {noformat}
> > exiftool.exe -validate -error -warning -a "..\20171030_21481_COPY.jpg"
> Validate : 19 Warnings (17 minor)
> Warning : [minor] Odd offset for IFD0 tag 0x010f
> Warning : [minor] Odd offset for IFD0 tag 0x011a
> Warning : [minor] Odd offset for IFD0 tag 0x011b
> Warning : [minor] Odd offset for IFD0 tag 0x0131
> Warning : [minor] Odd offset for IFD0 tag 0x0132
> Warning : [minor] Odd offset for ExifIFD tag 0x829a
> Warning : [minor] Odd offset for ExifIFD tag 0x829d
> Warning : [minor] Odd offset for ExifIFD tag 0x9003
> Warning : [minor] Odd offset for ExifIFD tag 0x9004
> Warning : [minor] Odd offset for ExifIFD tag 0x9202
> Warning : [minor] Odd offset for ExifIFD tag 0x9205
> Warning : [minor] Odd offset for ExifIFD tag 0x920a
> Warning : [minor] Odd offset for ExifIFD tag 0x9286
> Warning : Non-standard count (1) for GPS tag 0x0001
> GPSLatitudeRef
> Warning : [minor] Odd offset for GPS tag 0x0002
> Warning : Non-standard count (1) for GPS tag 0x0003
> GPSLongitudeRef
> Warning : [minor] Odd offset for GPS tag 0x0004
> Warning : [minor] Odd offset for IFD1 tag 0x011a
> Warning : [minor] Odd offset for IFD1 tag 0x011b
> {noformat}
> I need some advice on how to proceed here. Since Sanselan does not appear to
> do what it should (even on very basic metadata editing), am I correct to
> assume that the current version of Commons Imaging does a better job? :-)
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