Timeline view: creation vs modification date

Hello everybody,

when working with the timeline view (in the current svn kde3 version), the
tool selects those pictures which were last changed in the entered time
interval. However, I would rather like to select those pictures which were
taken in the selected time range (and maybe modified later). Is it possible
to configure this somewhere?

Best, Gandalf
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[Marcel Wiesweg]

> Hello everybody,
>
> when working with the timeline view (in the current svn kde3 version), the
> tool selects those pictures which were last changed in the entered time
> interval. However, I would rather like to select those pictures which were
> taken in the selected time range (and maybe modified later). Is it possible
> to configure this somewhere?
>
> Best, Gandalf

In the KDE3 version we have only one "date" field in the database, usually
creation date I think but I am currently not familiar if there are cases
where this is the file system modification date.

In the upcoming KDE4 release, we will have three distinct date fields: File
system modification date, metadata creation date and metadata digitization
date. The timeline tool is then based on the creation date.
The metadata field for finding out this date are, in order, which field is
found first:

Exif.Photo.DateTimeOriginal
Exif.Photo.DateTimeDigitized (*)
Exif.Image.DateTime
Xmp.exif.DateTimeOriginal
Xmp.exif.DateTimeDigitized (*)
Xmp.photoshop.DateCreated
Xmp.xmp.CreateDate
Xmp.tiff.DateTime
Xmp.xmp.ModifyDate
Xmp.xmp.MetadataDate
Iptc.Application2.DateCreated
Iptc.Application2.TimeCreated
Iptc.Application2.DigitizationDate (*)
Iptc.Application2.DigitizationTime (*)
File system creation date


(*)
Gilles:
I am wondering if e.g. Xmp.exif.DateTimeOriginal should not have priority over
Exif.Photo.DateTimeDigitized if we are explicitly looking for the creation
date, and not the digitization date. Perhaps we split out a method
getCreationDateTime(), and then getImageDateTime() first calls
getCreationDateTime() and secondly getDigitazationDateTime()?


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[Gilles Caulier-4]

2008/5/22 Marcel Wiesweg <[hidden email]>:

>> Hello everybody,
>>
>> when working with the timeline view (in the current svn kde3 version), the
>> tool selects those pictures which were last changed in the entered time
>> interval. However, I would rather like to select those pictures which were
>> taken in the selected time range (and maybe modified later). Is it possible
>> to configure this somewhere?
>>
>> Best, Gandalf
>
> In the KDE3 version we have only one "date" field in the database, usually
> creation date I think but I am currently not familiar if there are cases
> where this is the file system modification date.
>
> In the upcoming KDE4 release, we will have three distinct date fields: File
> system modification date, metadata creation date and metadata digitization
> date. The timeline tool is then based on the creation date.
> The metadata field for finding out this date are, in order, which field is
> found first:
>
> Exif.Photo.DateTimeOriginal
> Exif.Photo.DateTimeDigitized (*)
> Exif.Image.DateTime
> Xmp.exif.DateTimeOriginal
> Xmp.exif.DateTimeDigitized (*)
> Xmp.photoshop.DateCreated
> Xmp.xmp.CreateDate
> Xmp.tiff.DateTime
> Xmp.xmp.ModifyDate
> Xmp.xmp.MetadataDate
> Iptc.Application2.DateCreated
> Iptc.Application2.TimeCreated
> Iptc.Application2.DigitizationDate (*)
> Iptc.Application2.DigitizationTime (*)
> File system creation date
>
>
> (*)
> Gilles:
> I am wondering if e.g. Xmp.exif.DateTimeOriginal should not have priority over
> Exif.Photo.DateTimeDigitized if we are explicitly looking for the creation
> date, and not the digitization date. Perhaps we split out a method
> getCreationDateTime(), and then getImageDateTime() first calls
> getCreationDateTime() and secondly getDigitazationDateTime()?

Following the Exif spec, DateTimeOriginal and DateTimeDigitized must
be set at the same value.

But this is not the case with all camera. I have seen several cases
parsing my huge photo repository:

1/ DateTimeOriginal = DateTimeDigitized
2/ DateTimeOriginal is only set in Exif
3/ DateTimeDigitized is only set on Exif
4/ DateTimeOriginal and DateTimeDigitized are not available (and a
private tag is set on Makernote (why ???)
5/ DateTimeOriginal and DateTimeDigitized are null date (00:00:00
01-01-1970) => camera clock failure

But in all case, i have never seen DateTimeOriginal != DateTimeDigitized

This way can be follow with XMP exif tags of course, but i don't know
a camera which set XMP metadata.

Best

Gilles
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