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

what can I add.. please please give us the feature. I am so satisfied with LR, but this is really missing 😞

Good point. I have cases where the facial recognition does not find all the faces that are obviously in the picture in which case "additional indexing" captures my need. However, I have many more cases where the facial recognition is so screwed up that only complete re-indexing is appropriate. Again, this re-indexing should be on selected folders or photos only. This thread is 6 months old. I don't see anything in new updates addressing re-indexing.

I just tried it, and it isn't working for me. I tried both a 360° rotation and a 90° left-then-right rotation.

I read elsewhere that this won't work if you manually delete a region that Lightroom automatically added because it sets a flag in its DB that says "I already checked that one," so it refuses to go and try again, apparently thinking it would just waste a bunch of CPU cycles doing something it has already done.

The problem with that logic is that Lightroom knows more about faces when you tell it to go and look for faces again, so it should be able to do a better job the second time around.

I see the inverse problem here occasionally (less than 1%) too: a face detection box that includes only a section of the background, or similar, which I have to manually delete. I've stared at several of these to try and see why Lightroom thinks there is a face there, and I just don't see it. It's like Lightroom is experiencing a strange computer version of pareidolia.

Please introduce folder re-indexing, with destroying any existing face recognition data. Perhaps" additional indexing" is more accurate than re-indexing from scratch? The ability to re add faces which have been removed would be great

When I activated face recognition, I had selected a smart collection. Now only the images in this collection are face-recognised, nothing else, although I selected the option that my complete library should be indexed.

Definitely need this feature. If Picassa can do it, it should be in Lightroom too. The ability to tweak the detection settings on rescan (also available in Picassa) would be even more beneficial.

This is a must. Please adobe correct this ommission

Completely agreed. Please include this in next update to Lightroom 6!

This thread has been running 3 months and there have been LR6 updates but I do not see any improvements in face recognition. Is anybody at Adobe monitoring this discussion and are there any plans to fix it - soon?