uschindler commented on issue #12313:
URL: https://github.com/apache/lucene/issues/12313#issuecomment-1611685208

   I have a customer using Solr to do kNN for trademark images. Each trademark 
has several images and they want to find te trademark with closest imae match 
(cosine distance). They currently use some outdated homemade plugin using 
BinaryDocvalues and  scan through them, but to speed up search kNN looks like 
right Choice. But to do facetting they want hits counted on the trademarks and 
not on the images.


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