Robert,
Please look through the following paragraph for the user manual, will you?
Your system provides pretty sophisticated image management. None of the
image management software that I use includes such automatic remapping
of image locations. Its impressive.
Three suggestions to make the management of images using hash sums more
smooth:
1) If I understand it correctly there is a problem in calculating hashes
for each photo already associated with a dive in Subsurface. That is, to
update the existing dive log so that all photos have valid hash sums in
XML. It appears to me that, in order to do this, one has to force
Subsurface to save a dive while the photos are shown for that dive. In
large photo collections over large numbers of dives this may be a very
tedious and somewhat risky job: Open each dive individually, Do some
changes to dive details, save update for that dive. IF I AM CORRECT, I
think there is a big need for a facility that determines whether a)
there is an existing XML hash attribute for each image, b) if so,
whether the XML hash sum for each image is a valid hash sum, c) if there
is no hash sum or an invalid hash sum (e.g. ""), then to calculate the
hash sum for the image and write that into the XML. Is my understanding
of this correct? Because this is a once-of type of activity, such a
facility should probably be activated by a command line option, not from
within the GUI.
2) The option "Hash images" in the main menu is a bit cryptic for
non-technical users. I would suggest "Find moved images" or something
similar ??
3) Any way of reusing the same bottom blue bar shown while converting a
XML dive log to the new XML format? Some type of visual feedback while
doing the hash sum calculations and updating for all images is crucial.
Kind regards,
willem
[[Moving_images]]
==== Moving photographs among directories, hard disks or computers
After a photograph has been loaded into _Subsurface_ and associated with
a specific dive, the directory
where the photo lies is stored, allowing _Subsurface_ to find the
photograph when the dive is
opened again. If the photo or the whole photo collection is moved to
another drive or to a different
machine, it is unlikely that the directory structure will remain
identical to that of the original uploaded
photo. When this happens, _Subsurface_ looks for the photos at their
original location before they were moved,
cannot find them and therefore cannot display them. Because, after
moving photos, large numbers of photos
may need to be deleted and re-imported from the new location,
_Subsurface_ has a mechanism that eases the
process of updating the directory information for each photo:
automatic updates using fingerprints.
When a photo is loaded into _Subsurface_, a fingerprint for the image is
calculated and stored with the
other reference information for that photo. After moving a photo
collection (that has already been loaded
into _Subsurface_) to a different directory, disk or computer,
_Subsurface_ can perform the
following steps:
- look through a particular directory (and all its subdirectories
recursively) where photos have been moved
to,
- calculate fingerprints for all photos in this directory, and
- if there is a match between a calculated fingerprint and the one
originally calculated when a photo was
loaded into _Subsurface_ (even if the original file name has changed),
to automatically update the
directory information so that _Subsurface_ can find the photo in the
new moved directory.
This is achieved by selecting from the Main Menu: _File -> Hash
images_. This brings up a window within
which the NEW directory of the photos needs to be specified. Select
the appropriate directory and click
the _Scan_ button towards the bottom right of the panel. The process
may require several minutes to
complete, after which _subsurface_ will show the appropriate
photographs when a particular dive is opened.
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