People Assignments Lost

[Darius1968]

Over the past day, I did a rescan of my SSD, which had many of my image files, a good number of which have people assignments.  Well, for whatever reason, the metadata for said images has been erased!  All that remains are the entries in the People tab, which now show 0 images.  Wondering what could have caused this? 

A silver lining in this casualty is that the images themselves remain.  So, since the images still exist in the form of the thumbnails in the Peaple view, I'm wondering if IMatch has any way to snap an image out of those thumbnails, form which I could do a search for similar images? 

[Mario]

Why did you do a rescan?

The usual reason for this is users not relocating their images, but adding them again to a database after they have moved the images to a new disk or reorganized folders. Since the images are added again and are "new", all metadata associated with them previously is gone.

Restore your database from before whatever you did. Then you have all the person assignments again.
The people assignments and metadata exits only in the database, unless you have written back all information to the images.

If you have moved images to a new disk or changed folder organization outside of IMatch (IMatch will show the images as off-line), use the Relocate command (Off-line Folders and Files) to tell IMatch where the images are now.

[Darius1968]

I
I had written all metadata back to all images from which I lot metadata - That's what is so strange! 

I did a rescan because I have found in the past that sometimes there were some files that had not been automatically added to my database without, for example, rescanning my C drive. 

[Mario]

I had written all metadata back to all images from which I lot metadata - That's what is so strange! 

IMatch imports XMP face regions by default, creating face annotations based on them.
Check your settings under Edit menu > Preferences > Metadata 2 and make sure "Import XMP Face regions" is on.

If you don't see Face annotations in the Viewer / Quick View Panel, check that you have not accidentally disabled annotation display. Open the smart menu in the Viewer with <S> "Show Annotations" must be on.

You can also check your files in the ExifTool Command Processor with the "List Metadata" preset and then searching for region to see if they contain face regions.