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Date: Fri, 8 Dec 2017 10:27:00 +0000 (UTC)
From: "Bruno P. Kinoshita (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
Message-ID: <JIRA.13113136.1509393971000.416976.1512728820229@Atlassian.JIRA>
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Subject: [jira] [Commented] (IMAGING-205) Imaging (Apache Sanselan) produces
 "odd offsets" in (EXIF) metadata
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archived-at: Fri, 08 Dec 2017 10:27:05 -0000


    [ https://issues.apache.org/jira/browse/IMAGING-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16283314#comment-16283314 ] 

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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