Before revision:  They are utilized to detect 10 static gestures for each hand and to obtain hand image-embeddings from the last Fully Connected layer, which are subsequently fused with the augmented pose vector and then passed to  stacked Long Short-Term Memory blocks.
After revision:  It is utilized to detect 10 static gestures for each hand and to obtain hand image-embeddings from the last Fully Connected layer, which are subsequently fused with the augmented pose vector and then passed to stacked Long Short-Term Memory blocks.