Thousand of person face recognition keywords disappeared - how do I reindex?

Hi,
While using the new face recognition feature halfway through 60 000 photo the keyword link disappeared for a number of the persons I had indexed. I assume they are all gone, but how do I restart a new indexing. There does not seem to be an option for this.
rgds

Hello Geoff,
Smart albums might be helpful for you:
Create a smart album with the single rule: "Face is not unnamed".
This will contail all images with faces assigned. To find all images without faces, use the rule: Face is unnamed.
You can also search for "Face is not John".
Regards
Léonie

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What are your namining conventions for people? - here's mine:
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Unknown / unidentified people.
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People I don't know and I am never likely to know (Eg random strangers on the street, local tour guides on holiday, random people in the background etc)
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People I don't know the names of yet but I am likely to find out (Eg actors in a production for which I don't have a programme)
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People I don't know the names of and there is only a slim possibility of meeting/photographing again (Eg guests as a client weeding)
It feels as though I out to just delete the face recognition and have done with it, and this is what I would do except for thing. Other than manually drawing face regions I have not yet found a way to get lightroom to rescan a folder for faces if you have previously deleted the face recognition. This means that deleting face regions from a large number of people is something that cannot be easily reversed. I might just leave these people in the "Unnamed People" category... at lease until such time as there is a way to rescan a folder or colectoin.
Summary
My practices are still evolving. But I hope these thoughts and idea will help others think through the issues and come up with solutions that work for their situation. I am interested in hearing how other people are using the face recognition system. Especially if anyone is aware of any 'best practices' that Adobe or anyone else has recommended.

Glad it helped.
Yes and no. You can still put the people keywords into hierarchies within the keyword list - you can arrange them just like any other keywords.so you just create a "smith family" keyword and store "john smith" under it. What you can't do is apply BOTH smith family and john smith the the same face.
My use of the hash tags came about because I initially had a top level keyword for models, one for clients, one for theatre peple and one for family and firends. Then discovered that some of the theatre folk were also clients (headshots) and what to do when a friend is also a client. So the hash tag system means a person can be both a friend, a model, an actor as well as being a client! (#T #C #M #F).

Performance, stability and usability face recognition

Hi
I have been testing out the face recognition feature in Lightroom CC and I have some questions/comments
My hardware setup:
CPU: i7-5820K
GPU: Geforce GTX 750 Ti, running Benq 3201 UHD display
RAM: 32 GB DDR4
Disk: 1 500 GB SSD for OS and SW, 1 240 GB SSD for Lightroom catalog, 1 6 TB disk with the photos
I run Windows 8.1 with the latest updates.
I have according to Lightroom 120.000 photos in lightroom, mainly RAW, but also quite many JPG. The photos are organized by year, month, camera on disk. A year as typically from 5.000 to 10.000 photos.
Performance
1) It takes days for Lightroom to go through the photos to do face recognition. That is ok, but according to Windows task manager Lightroom seldom use more than 10% CPU, there is little disk access and there is pleny of available RAM. What is the bottleneck?
2) If I try to handle all the photos together the pc starts lagging and everything goes very SLOW, but still no visable stress on the hardware - still about 10% CPU for Lightroom. It can take minutes to put photos to a named person. If I only take one year at the time the respons times are ok.
Stability
1) When I work with all the photos at once Task Manager says "Not Responding" a lot for the Lightroom entry.
2) The screen goes "white foggy" from time to time indicating that the pc/Lightroom has sever problems
3) The screen flickers sometimes when it is stressed out.
4) If I leave it at "All pictures" it is very often inpossible to use it again, I do not get contact with Lightroom, I have to terminate the Lightroom prosess and start again
5) Other applications works allright, but might lagg when Lightroom is very stressed
Usability
1) I thought face recognition would become better and better as it learned from more and more photos. It does not seem that way. It is quite often not helpful at all - you have to do a lot manually
2) It seems it does not use other photos for face recognition than current folder, that means that when I can not use the root folder due to the performance problems I have to go through the same process again and again
3) The algoritems does not seem to take time line into account, when trying to find who the person is. I think that is something that is important to to to make it more useful.
I have been waiting for face recognition in Lightroom for many years and so far I am not very pleased.
Anybody that have had nice expirience with face recognition so far?
Any workarounds?
What do the Lightroom engineers have to say about this?

I agree with all the observations above. I have a 25,000 photo database, and am running a Dell Precision with 16gb ram. After people tagging for a while, the screen starts to flicker back and forth between Lightroom and other open apps, or the desktop. It won't respond until restart or put the computer to sleep & login again.
The face recognition is very poor in comparison to Picasa. The more faces you identify, the more bizarre and random the suggestions for a match become. All races, genders and with very few apparent common features. I would prefer NOT to have thousands of suggested names to sort through. If the face doesn't match within close parameters, just leave it in "unknown" without suggestions.
I like the way Picasa groups similar faces, then asks "Who is this?"
Auto-complete for people names is maddening. If you enter a space (don't names have a space between first name & surname?), it apparently resets. So if I type in John Martin, it wants to auto-complete as John Martin Smith. (John Martin & Martin Smith being two DIFFERENT individuals already identified). I already have 10 men named David in my file. As soon as I hit the space, (assuming no one has his last name as a first name), auto-complete DOESN'T work at all. So my husband's name, (a very common first name) has to be typed in its entirety each time. Picasa doesn't have a problem with spaces...
I have a huge collection of magazine clippings and sewing patterns. I would like a way to exclude certain folders from the face search. I don't even want to see those faces.
I'm stunned by the huge number of non-human things identified as faces. Once in a great while, I can see why... but I never had this problem in Picasa.
I LOVE, LOVE, LOVE Lightroom, but don't think this feature is up to snuff, at all, no way, no how.

BUG: Face recognition data not saved to images.

i have the option to automatically save XMP data into the images activated.
so all keywords and metadata changes are not only saved to the catalog but also into my DNG and TIFF images.
now this works fine for everything except the new face recognition data.
i mean the areas (rectangles) where the faces are.
i guess the problem is that the images already contain the keywords (names) of the persons in the images.
what i did was using the rectangles to identify the persons in the images. drawing rectangles around their faces and name them.
this info about the rectangle positions is NOT automatically stored in the image files. not after hours of letting LR run idle.
this info is only stored when i manually save (CTRL+S) the images or do something other to the metadata (like adding NEW keywords to it).
so in short: just adding the face region data (the rectangles) will not trigger the automatic XMP save function when the name keyword was already asigned as keyword to the image.
that´s very bad and must considered a bug in my opinion..
i don´t like to rely on the LR catalog only. it´s unsave even with backups.
i want that the metadata info is stored in the images.
also when i give away my images i want that the metadata is in the images.
that´s why "automatically save XMP" is always active and very important for me.

I don't have any info but repost your original info at this site. Supposedly Adobe reads this and it should not get lost in the clutter I have posted a few bugs there and they were acknowledged but not fixed but Adobe seems to be pretty good at fixing potential data loss bugs/problems which I consider this to be if it is working as you describe.
Photoshop Family Customer Community

Strange UI bug when using People view/face recognition

I've started playing with the face recognition in LR6/CC and have encountered an odd display bug when viewing the groups of 'named people':
The thumbnail for each named person includes a count of how many images (or perhaps that should be faces) are attributed to their specific name. However, once the number of images for a person exceeds 100, LR only displays the first two digits in the thumbnail and drops off the third one, e.g. 254 is displayed as 25. If you hover over the thumbnail, the full count (e.g. 254) is displayed so long as the mouse cursor is kept on the thumbnail. Interestingly, once the number of images attributed to a named person exceeds 1000, it does the same thing, only it adds an extra digit (so 1400 becomes 140).
I'm running this on Win7.
Anyone else seeing this?
M

I guess I was primarily "testing the water" to see if the problem was specific to my configuration in some way, but you make a fair point John.
Here's my (possible) bug report: LIGHTROOM Facial recognition: thumbnails not displaying full number
M

Thousand of person face recognition keywords disappeared - how do I reindex?

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