EXIF in PNG not transferred to Save-As JPG

[Ari]

quick question: Just noticed that when opening a PNG that has embedded exif info, adjusting the image and then saving it as JPG, the EXIF data is lost (it should be copied into the jpg I guess); is there a config option to enable this or a workaround?

TIA

[Arnd Baecker]

On Tue, 13 Nov 2007, Ari El wrote:

>
> quick question: Just noticed that when opening a PNG that has embedded exif
> info, adjusting the image and then saving it as JPG, the EXIF data is lost
> (it should be copied into the jpg I guess); is there a config option to
> enable this or a workaround?

Sounds like a bug. Could you open an entry in the bug tracker
http://bugs.kde.org/wizard.cgi (Search for "digikam")
and attach a small example.

Thanks a lot in advance,

Arnd
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Enrico-26]

It seems that also for TIFF happens the same... output conversion files of RAW images, if converted to LZW-compressed TIFF, loose the EXIF.
 
...hope it is useful to be signalled.
 
Enrico

> Date: Wed, 14 Nov 2007 07:55:49 +0100
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [Digikam-users] EXIF in PNG not transferred to Save-As JPG
>
>
>
> On Tue, 13 Nov 2007, Ari El wrote:
>
> >
> > quick question: Just noticed that when opening a PNG that has embedded exif
> > info, adjusting the image and then saving it as JPG, the EXIF data is lost
> > (it should be copied into the jpg I guess); is there a config option to
> > enable this or a workaround?
>
> Sounds like a bug. Could you open an entry in the bug tracker
> http://bugs.kde.org/wizard.cgi (Search for "digikam")
> and attach a small example.
>
> Thanks a lot in advance,
>
> Arnd
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users

---

Discover the new Windows Vista Learn more!
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-4]

2007/11/14, Enrico EAS <[hidden email]>:

It seems that also for TIFF happens the same... output conversion files of RAW images, if converted to LZW-compressed TIFF, loose the EXIF.
 
...hope it is useful to be signalled.

No. Libtiff do not support Exif/Makernotes !!! This is why Exif are never transfered in tiff file...

For PNG, i never seen this problem. I use PNG to host all my RAW files modifications and transfer at end to JPEG for publishing. I never lost Exif in JPEG

Gilles Caulier

_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Ari]

Will open a bug after I confirm whether this still happens in the latest svn, so I don't waste your time.

The PNGs are 16-bit 10MP generated by UFRAW, the originals are NEFs from a d80. I'm using the latest stable ufraw, 0.13. Krita (the one used in ubuntu 7.10) can open the same PNG and shows the image size and bit depth with no problem, and then saves the exif data to the jpg. Digikam 0.9.2 fails to show dimensions and bit depth, and fails to save the exif in this case.

Gilles Caulier-3 wrote

2007/11/14, Enrico EAS <[e-mail]>:
>
>  It seems that also for TIFF happens the same... output conversion files
> of RAW images, if converted to LZW-compressed TIFF, loose the EXIF.
>
> ...hope it is useful to be signalled.
>


No. Libtiff do not support Exif/Makernotes !!! This is why Exif are never
transfered in tiff file...

For PNG, i never seen this problem. I use PNG to host all my RAW files
modifications and transfer at end to JPEG for publishing. I never lost Exif
in JPEG

Gilles Caulier

_______________________________________________
Digikam-users mailing list
[e-mail]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-4]

2007/11/14, Ari El <[hidden email]>:

Will open a bug after I confirm whether this still happens in the latest svn,
so I don't waste your time.

The PNGs are 16-bit 10MP generated by UFRAW, the originals are NEFs from a
d80. I'm using the latest stable ufraw, 0.13. Krita (the one used in ubuntu
7.10) can open the same PNG and shows the image size and bit depth with no
problem, and then saves the exif data to the jpg. Digikam 0.9.2 fails to
show dimensions and bit depth, and fails to save the exif in this case.

About this subject, please open a new file in bugzilla and attach the PNG file to test and hack. Thanks in advance

Gilles Caulier

_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Ari]

The PNG > JPG EXIF is fixed in digikam svn (maybe due to the fact that I also upgraded exiv2 and libkexiv2)

The "unknown" dimension / bit depth /compression is still there; i'll file a bug for this.

Thanks!

Gilles Caulier-3 wrote

2007/11/14, Ari El <[e-mail]>:
>
>
> Will open a bug after I confirm whether this still happens in the latest
> svn,
> so I don't waste your time.
>
> The PNGs are 16-bit 10MP generated by UFRAW, the originals are NEFs from a
> d80. I'm using the latest stable ufraw, 0.13. Krita (the one used in
> ubuntu
> 7.10) can open the same PNG and shows the image size and bit depth with no
> problem, and then saves the exif data to the jpg. Digikam 0.9.2 fails to
> show dimensions and bit depth, and fails to save the exif in this case.


About this subject, please open a new file in bugzilla and attach the PNG
file to test and hack. Thanks in advance

Gilles Caulier

_______________________________________________
Digikam-users mailing list
[e-mail]
https://mail.kde.org/mailman/listinfo/digikam-users