Saving tags in JPEGs

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Saving tags in JPEGs

Hans Vollebregt
I am currently using  JPEG as my image storage format, and am thinking
of using Digikam as my photo management tool. Before I move away from
F-Spot, I would like to know what happens when I add a tag to a photo,
or when I change one. Since the tags are stored in the EXIF data in
the image itself, wouldn't (repeatly) adding and changing tags
eventually lead to loss in image quality, because Digikam has to save
the file each time a tag is added/changed?

Appreciate your thoughts on this subject, and pls forgive me if this
is a stupid beginners question!

-Hans
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Saving tags in JPEGs

Hans Vollebregt
Hi all,

I am currently using  JPEG as my image storage format, and am thinking
of using Digikam as my photo management tool. Before I move away from
F-Spot, I would like to know what happens when I add a tag to a photo,
or when I change one. Since the tags are stored in the EXIF data in
the image itself, wouldn't (repeatly) adding and changing tags
eventually lead to loss in image quality, because Digikam has to save
the file each time a tag is added/changed?

Appreciate your thoughts on this subject, and pls forgive me if this
is a stupid beginners question!

-Hans
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Re: Saving tags in JPEGs

enaut-3
Hans Vollebregt schrieb:

> Hi all,
>
> I am currently using  JPEG as my image storage format, and am thinking
> of using Digikam as my photo management tool. Before I move away from
> F-Spot, I would like to know what happens when I add a tag to a photo,
> or when I change one. Since the tags are stored in the EXIF data in
> the image itself, wouldn't (repeatly) adding and changing tags
> eventually lead to loss in image quality, because Digikam has to save
> the file each time a tag is added/changed?
>
> Appreciate your thoughts on this subject, and pls forgive me if this
> is a stupid beginners question!
>
> -Hans
>  
Metadata is rewritten without touching the imagedata usually... so those
operations should be absolutely lossles.

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Re: Saving tags in JPEGs

Bugzilla from mikmach@wp.pl
In reply to this post by Hans Vollebregt
Dnia Saturday 07 of June 2008, Hans Vollebregt napisaƂ:

> I am currently using  JPEG as my image storage format, and am thinking
> of using Digikam as my photo management tool. Before I move away from
> F-Spot, I would like to know what happens when I add a tag to a photo,
> or when I change one. Since the tags are stored in the EXIF data in
> the image itself, wouldn't (repeatly) adding and changing tags
> eventually lead to loss in image quality, because Digikam has to save
> the file each time a tag is added/changed?
>
> Appreciate your thoughts on this subject, and pls forgive me if this
> is a stupid beginners question!

There was similar questions several weeks ago, answer is: metadata
editing in digiKam is completely lossless because it doesn't touch
picture pixels.

m.
--
People tend to not say anything when they are satisfied, and to say
something when they are not, so you tend to only hear negatives, so
a nice comment is always appreciated. (Shawn Gordon of theKompany)

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