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G
Gintonic
Participating Frequently
April 25, 2015
質問

Face image region data written according to XMP-mwg-rs, but NOT read by LR.

  • April 25, 2015
  • 返信数 2.
  • 16130 ビュー

Great to see that LR CC writes face data to XMP-mwg-rs tags (jay!), according to Metadata Working Group (i.e. Adobe, Microsoft, Sony, Nokia, and others) extension of XMP. See  Image Region Metadata, Section 5.9 in the Metadata Working Group Spec.

---- XMP-mwg-rs

RegionAppliedToDimensionsW      : 1768

RegionAppliedToDimensionsH      : 2656

RegionAppliedToDimensionsUnit   : pixel

RegionRotation                  : -1.43512

RegionName                      : Benoit Gindele

RegionType                      : Face

RegionAreaH                     : 0.04897

RegionAreaW                     : 0.03262

RegionAreaX                     : 0.59858

RegionAreaY                     : 0.72477

RegionRotation                  : -1.52229

However, LR does NOT read and process existing XMP-mwg-rs written by other software, e.g. Picasa  (Nooooooo!).

Picasa in turn reads and shows XMP-mwg-rs tags created by LR CC flawlessly.

With large collections this is obviously a severe limitation for moving to LR, as well as for general interoperability. Adobe went half the way.

Thousands and thousands of clicks to go, again...

このトピックへの返信は締め切られました。

返信数 2

M
Mywayout
Participant
May 6, 2015

Here is what I found that fixed the problem for me

Below is the solution to get face tags from windows photo gallery to Lightroom for me. Be sure to backup your files.


*** Backup your files ***

Move people names to keywords for Lightroom. Do this if you're using lightroom, do not do it if you're using picassa. I haven't yet been able to check to see but I'm guessing I will have to "convert it to a person tag" in lightroom keywords since they show as descriptive tags but I have tested everything else.

With Exiftool, open the command prompt and navigate to the folder with exiftool in it:


Add the people names to the keywords

exiftool "-xmp:subject+<regionname" FolderName -overwrite_origional_in_place -m -r


This came from:

Migrating from WPG to Lightroom 6 - People Tags

    johnrellis
    johnrellis
    Legend
    April 26, 2015

    Upload to Dropbox or similar a sample pic from Picasa that shows the problem and post the link here.  That will let us identify the specific issue and file a bug report/feature request.

    G
    Gintonic作成者
    Participating Frequently
    April 27, 2015

    This image has a named face image region applied through Picasa:

    https://dl.dropboxusercontent.com/u/13499200/IMG_0903.JPG

    Exiftool output:

    ---- XMP-mwg-rs

    RegionAppliedToDimensionsW      : 3264

    RegionAppliedToDimensionsH      : 2448

    RegionAppliedToDimensionsUnit   : pixel

    RegionName                      : Nicoletta S.

    RegionType                      : Face

    RegionAreaX                     : 0.778799

    RegionAreaY                     : 0.18076

    RegionAreaW                     : 0.0649509

    RegionAreaH                     : 0.10335

    RegionAreaUnit                  : normalized

    When importing the file, LR CC does not seem to read and process the XMP-mwg-rs tags.

    Neither does the name show up in the People list, nor does it show the region area and the associated name in the corresponding interface.

    As mentioned in opening post, going the other way works: Images with named regions added through LR CC are recognized by Picasa, added to its list of people and can be processed through its face region overlay interface, i.e. renamed, moved, deleted etc.

      johnrellis
      johnrellis
      Legend
      April 28, 2015

      When I import that sample pic, LR imports the face region and the name applied to that region ("Nicoletta Stanescu"), and it creates a keyword "Nicoletta Stanescu", but it doesn't apply that keyword to the photo:

      It doesn't apply the keyword to the photo because it wasn't specified in the photo's XMP:Subject or IPTC:Keywords fields. 

      The core issue is that LR represents named faces using both MWG regions and keywords, whereas Picasa apparently just uses MWG regions.  When LR imports a Picasa photo, it correctly imports the region and the name attached to the region.  But because Picasa didn't also record a keyword for that person, LR didn't attach any keyword to the photo on import.   I don't see anything in the MWG Guidance that prefers the behavior of one program over the other in this situation.

      To work around this incompatibility, you could use Exiftool to copy values in the Region Name field into the XMP:Subject field before you import the photos into LR.

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