Hi Bruno,
thanks for your reply.

> I think you tried to include screenshots? If so, it doesn't work very well in 
> this mailing list.


ohh, I didn't figure and didn't notice.

>
> Could you try adding as attachment, or upload them, or use plain text to 
> describe the issue? I recently had to work on the tags for some TIFF & JPEG 
> metadata in [imaging], so hopefully we will be able to locate the right tag.


Fantastic. I investigated further but am still not able to solve this.

The tag I would like to update is one that produces (at least this is
what I read in the imagemagick image info) a section

Properties:

and under start section I find

comment: 
GEO-Information,46.5640616313:11.523790723,46.5640616313:11.5093674258,46.5585048222:11.523790723,46.5585048222:11.5093674258,0.000000

The most similar result I have been able to produce with the tags is:

exif:UserComment:GEO-Information,46.5640616313:11.523790723,46.5640616313:11.5093674258,46.5585048222:11.523790723,46.5585048222:11.5093674258,0.000000

and

exif:WinXP-Comments:GEO-Information,46.5640616313:11.523790723,46.5640616313:11.5093674258,46.5585048222:11.523790723,46.5585048222:11.5093674258,0.000000

both not the same as what i am looking for.


I have been able to print the following information through an
application called exifprobe:

@0x0000002=2       :    <JPEG_COM> length 137:
''GEO-Information,46.5640616313:11.523790723,46.5640616313:11.5093674258,46.5585048222:11.523790723,46.5585048222:11.5093674258,0.000000\0''
@0x000008d=141     :    <JPEG_APP0> 0xffe0 length 16, 'JFIF'
@0x0000096=150     :      Version       = 1.1
@0x0000098=152     :      Units         = 'dots/inch'
@0x0000099=153     :      Xdensity      = 96
@0x000009b=155     :      Ydensity      = 96
@0x000009d=157     :      XThumbnail    = 0
@0x000009e=158     :      YThumbnail    = 0
@0x000009e=158     :    </JPEG_APP0>
@0x000009f=159     :    <JPEG_DQT> length 67
@0x00000e4=228     :    <JPEG_DQT> length 67
@0x0000129=297     :    <JPEG_SOF_0> length 17, 8 bits/sample,
components=3, width=1608, height=901
@0x000013c=316     :    <JPEG_DHT> length 31 table class = 0 table id = 0
@0x000015d=349     :    <JPEG_DHT> length 181 table class = 0 table id = 1
@0x0000214=532     :    <JPEG_DHT> length 31 table class = 1 table id = 0
@0x0000235=565     :    <JPEG_DHT> length 181 table class = 1 table id = 1
@0x00002ec=748     :    <JPEG_SOS> length 12  start of JPEG data, 3
components 1448808 pixels
@0x006b1a4=438692  :  <JPEG_EOI> JPEG length 438694

So I think this (JPEG_COM) is not an exif tag as I had been told. I am
guessing this is reflected by the library's ComSegment class, but I
could not find any documentation or testcase which would tell me what
it is and how to rewrite/update it.

Any help is most appreciated,
Thanks,
Andrea




>
> CheersBruno
>
>
>       From: andrea antonello <andrea.antone...@gmail.com>
>  To: Commons Users List <user@commons.apache.org>
>  Sent: Wednesday, 25 April 2018 1:56 AM
>  Subject: [imaging] Comment tag problem
>
> Hi, I need some help to find the right tag to use to recreate a tag in a
> jpeg file.
>
> Here is the output of the info given by ImageMagick:
>
>
>
> The tag I need should be under "Properties"
> and be named: comment
>
> I have tried to use user_comment and xpcomment, but they produce something
> different, like:
>
>
>
> Can anyone tell me which tag I can use to generate the "comment" tag?
>
> Thanks for any hint,
> Best regards,
> Andrea
>
>
>

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