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51 Messages

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2.2K Points

Sun, Apr 26, 2015 6:27 PM

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

Currently it is not possible to invoke a re-indexing of facial recognition data at either the global or folder/collection level. For my purposes re-indexing at the folder and collection level would be sufficient.

Reason: when a face is removed from a previously indexed image it is not possible to automatically recognize faces other than reviewing many images and manually applying a face region.

See this forum discussion: https://forums.adobe.com/message/7472...

165

Responses

Official Solution

1.7K Messages

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32.4K Points

2 years ago

Lightroom 7.3 is now available https://feedback.photoshop.com/photoshop_family/topics/lightroom-classic-7-3-is-now-available

This version of Lightroom contains a much improved face engine and the ability to re-index photos for faces. See 
https://helpx.adobe.com/lightroom/help/face-recognition.html#find-faces-again for details.

Cheers,

6 Messages

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234 Points

Wahoo! I can't wait to try this tonight!

28 Messages

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708 Points

Unfortunately, this does me no good whatsoever as I refuse to switch to the subscription version of Lightroom.

3 Messages

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142 Points

5 years ago

Please enable this, as the current functionality appears to be in a "beta" stage & is limited at the moment.

1 Message

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102 Points

5 years ago

I am in total agreement with this request.

1 Message

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100 Points

5 years ago

Same for me. I need this function !!

2 Messages

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332 Points

5 years ago

Yes, this is a function that should be available. Had tagging completed on a catalog with over 30k images in LR5 and upgraded. Went through tagging with facial recognition and was nearly done (5k left) and lost all tags but a few faces. Now, I've lost all person tags, even the ones I had in LR5.

24 Messages

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1.2K Points

5 years ago

With a large catalog 200K+ images as I have this is an essential. Additionally we need some control over the granularity over the face detection - at the moment FR is missing 30-40% of faces. We need to be able to say 'try again' and search harder!

Also re-indexing needs to be in two flavours - start from scratch on the selected images and secondly and more importantly search for faces not previously found - without removing those previously found and labelled.

37 Messages

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820 Points

Completely agree. The granularity is a feature offered in Picasa.

1 Message

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62 Points

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

32 Messages

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570 Points

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.

1 Message

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62 Points

I fully agree. Lightroom needs two updates asap:
1) ability to rescan all photos for faces
2) ability to set granularity to the facial recognition function. There are currently approx 30-50% faces being missed in my photos. I am willing to manually deselect what is not a face rather than to have to go through all the photos to make sure there isnt a face missed

Additionally, I would welcome better selection management based on facial recognition. I currently cannot select 6 people and see only photo where they are all together.

1 Message

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184 Points

5 years ago

Also, Lightroom found almost 30,000 faces in my photos. But it is terrible at grouping the faces together. I have many, many groups of my son in stacks of 4 or 5 photos, instead of 1 stack of hundreds of photos. Now that I have named a bunch of photos, perhaps reindexing would allow Lightroom to more intelligently create larger groups of photos of the same person?

Champion

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5.8K Messages

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102.2K Points

5 years ago

David, it only stacks them if it's really pretty sure it's the same person. This means that you can generally name the stack without having to look inside.

If it bunched all of the guesses together, half of them would be wrong, but if you want to see that view, double click on a photo of your son and confirm them in the Similar section of the Person view. That view is a lot more relaxed about suggestions.

1 Message

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62 Points

Victoria, I think you are confusing the guess window and the confirmed window. I've got the same as David. In the confirmed panel, a single stack for each of 4 persons (with a high number of hits inside), then 15 stacks of one person (i.e. same person and same name on stack) with a low numer of hits inside each. I've tried to drag one stack on top of the other for this same name, accepting to 'rename' in the process (though it is a rename to the same name), but to no avail. Do you have any tip for this problem?

Champion

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5.8K Messages

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102.2K Points

Can we try some proper names for different UI elements? That might help us all be on the same page. At the top of the People view we have Named People then below we have Unnamed People. In the Single Person view, we have the Confirmed section at the top and then the Similar section. Where are you looking? Or screenshots would help greatly.

31 Messages

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540 Points

I have images taken moments apart of a model who doesn't move that are not merging together.  There is something wrong with the algorithm to some extent.  The photos can be next to each other 2 seconds apart and not perceptively different and it won't recognize them as the same person

1 Message

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82 Points

5 years ago

This function is quite a must

1 Message

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100 Points

5 years ago

The feature to re-index faces is a must.

2 Messages

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332 Points

5 years ago

Re-running face detection, globally and at the folder and selected photo(s) level, has to be a priority for the NEXT update. The "hit rate" for simply detecting faces in a photo (not identifying, just detecting that a face is there) is incredibly low. I'm seeing less than 50% success rate in detecting faces. Recognizing who is in each photo isn't performing well either, but failing to detect the only face in a portrait photo is a pretty big bug.

3 Messages

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90 Points

5 years ago

I second that...

1 Message

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82 Points

5 years ago

Need this function as well.

6 Messages

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152 Points

5 years ago

"right click" access to a "rescan this image for faces" menu item in the library module would make my workflow much smoother.

6 Messages

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232 Points

5 years ago

Here's a rescan work around. Try rotating your images!

You may have to rotate them back, but this seems to trigger the Face reognition process again.

I made the big mistake of deleting the face catalogue accross my entire library after my PC virtually stopped responding. Apx 50,000 faces had been detected but not labelled, and the ID/naming process was so painfuly slow I figured what harm could it be starting fresh again. Little did I realise that face recogition was a one trick pony, and once run, couldn't be re run again. I'm sure many others have been tripped up by this, and find it hard to imagine how Adobe engineers could have designed the UI with such a glaring ommision.

Anyway, give it a go - YMMV. :-)

3 Messages

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142 Points

A rotate that doesn't affect the provisos originals can do this?

6 Messages

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232 Points

I've tested this on small sets of 20-30 images using bulk select/actions. Rotating once triggers a rescan which picks up some faces, rotating back to original orientation forces another rescan which picks up the rest. Not the most elegant fix, but it works for me. :-)

3 Messages

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142 Points

You know, if I actually had the time (which I don't) it wouldn't be that hard to go into the LR6 database, find out which tables & fields are marking a photo as "skip_facial_recognition", and just unmark them en masse with an sql lite database editor. But, this should be Adobe's job. Thanks for the tip!

1 Message

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84 Points

Thanks, this indeed works as a workaround. Adobe should really implement the reindexing though!

32 Messages

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570 Points

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.