Hi,
I am trying to populate certain image fields from the filename.
it is like 090713_Hamburg_SomeTitle

I would like to set 09-07-13 as the image date, Hamburg as location
and SomeTitel as title.
As a one off I could just designa SQL update that does this, but I need
it work genericly, whenever an new file is identified
in an album folder

any ideas ?

Wouldn't it be easier to use meta data like EXIF for this?

This can be done but will be quite some work using image filters. You will have to divide the file name using standard php functions like explode and then set the database values. You have to do this using the object model framework:
$imageobject->set("",""); $imageobject->save();
You have of couse to have this image object.

Also 09-07-13 is not a valid date, you need to include the time as well (Datetime field format is "YYYY-MM-DD hh-mm-ss")