P: Allow facial recognition feature to re-index a folder/collection

Please check out the next Lightroom update.

I would also like to bring this "idea" post to folks attention as a few ideas how to improve the feature even futher than just a re-index command. 

https://feedback.photoshop.com/photoshop_family/topics/people-view-progress-bar-button

Is there an update on this?  I haven't seen anyone from Adobe chime in on this thread as I have on many, many others. 

I've just tried the flip photo suggestion in Lightroom Classic CC 7.2 without success (first tried horizontal flip and then vertical flip when horizontal failed) but neither worked.
Whats the point of Adobe putting automatic facial recognition as an option in a program when you can't rerun it on a set of photos?
Adobe seems to be recommending that we all get RSI (Repetitive Strain Injury) by manually selecting each photo and individually tagging them 😞

I just imported 6000 family photos and ran facial recognition on them. Now I find I have to go back and make sure that all the photos are properly tagged. About 25% are not tagged properly. I really wish I could re-scan instead of going through them one-by-one to make sure they're tagged.

I want Lua plugin interfaces for face recognition because already people in my photos named as caption.
If Lightroom could use this database, makes large efficiencies at face recognition for future shoot.

Does Adobe actually read these forums? We're now 2 years out and facial recognition in Lightroom is still crap. Meanwhile, Google previously in Picasa and now in Google Photos has facial recognition that could cause the CIA to increase their budget for Kleenex. Even Facebook has decent facial recognition. The truly sad thing is that both of these are free-to-user products.

Come on Adobe, you can do it!

Hi staylor, I had the same issue with the lagging and even the crashing on a fully updated high-powered Mac....
My solution was to select all photos (ok do by folder if you have several thousand like me), flip all horizontal. run the face recognition, assign the faces and then flip it back. 
Was able to regain a few thousand like that but not sure it's all of them....at least something. 
Normally Adobe should get their act together (this has been pending for years) and simply modify the function to
(a) Keep the assigned faces
(b) reopen all the unassigned ones.
Should not be too difficult....if you care.

Sadly adobe has the worst facial recognition in the industry. Amazon, Apple, google, all figured it out. I think Adobe developers have been lagging behind for quite some time and the more features others implement the more we see their lacking.

Adobe, please implement this feature.  It's been a long time coming.  It's time.

I accidentally removed a large set of face regions (an entire person) when trying to clean things up (because there are so many poor matches in face recognition).  Because my mouse clicks / keyboard commands were lagging behind by 15-30 seconds depending on what I was doing (I have a lot of pictures but clearly Lightroom has performance issues), I apparently removed a "person" that I REALLY want back.  This particular person (the face regions identified for this person) was found around 8000 times in my photos (that I spent hours assigning and correcting the face assignments) and now it shows 35.  I clearly multi-selected a huge amount of face regions that I shouldn't have (again, LR was processing my commands with a 15-30 second lag time).  I want to undo this (but I'm not sure how it happened and it is no longer in my undo queue.

PLEASE ADOBE...  I WANT TO RESCAN A SET OF FOLDERS TO GET THIS PERSON BACK!!!  THERE IS NO WAY I AM DRAWING 8000 FACE REGIONS MANUALLY.  That's really not a "workaround".

Adobe - I get it.  I screwed up.  But Lightroom isn't really making it easy for me and I can't seem to fix this.  

Can someone from the Lightroom team simply reply to this thread so everyone isn't left in the dark feeling like we are being completely ignored?  Just a bit of customer service would be greatly appreciated.