Is there a way to perform metadata filtering in Lightroom (version 6) that allows finding images that contain multiple faces? For example, I would like to see image where BOTH of my kids are in them (i.e. 'AND' condition). I know you can use the metadata filtering but it seems to allow only for 'OR' combination - i.e. where either of my kids is in the image but not both.
Lightroom search does have its weaknesses, but finding the intersection between multiple keywords is definitely something it can do. My favourite way to do this is using the "Library Filter" menu. Select all Photographs, then activate "Metadata" filter, change the first column to "Keyword" and select your first keyword. Then change the second column to "Keyword" again and select your second keyword from the list. The results below will match the intersection of your selected keywords.
Lightroom has a nice feature for this. It might look complicated but it is really easy and powerful! After getting accustomed it becomes 'piece of cake'.
- [optional] Clear Quick Collection
- Filter photos with the first of your kids (by clicking on apropriate keyword)
- Select all of them (Ctrl-A or Command-A)
- Filter photos with the second of your kids (by clicking on apropriate keyword) - important! it must be a single click change
- Now only photos that BOTH of your kids are on will stay selected
- [optional] If the selection alone is not enough for you - add the selection to Quick Collection by pressing "B"
- [optional] Display Quick Collection
BTW1. You can continue to filter the third of your kids ;) and so on.
BTW2. This is a common way to find the intersection of two sets of photos. For example you can select all photos in one of your collection and then change collection to another one - now you have selected all photos that are in BOTH collection. This can be used to find the intersection between any sets filtered by keywords, collections, folders or an arbitrary selection of your choice.
UPDATE 2016-10-14: Unfortunately I have noticed important bug in LR 6 - when the intersection is an empty set LR selects a first photo!!! I guess it a new bug in version 6 that means my method is not reliable as it was.
To my knowledge Lightroom's search is pretty limited and you can not do that. What I did was use the Any Filter Lightroom Plugin by John Rellis. I do not remember the exact syntax to perform the search you are trying to do but I believe it will do what you need once you figure it out.