Hand number gesture recognition using recognized hand parts in depth images

摘要

In this paper, we present a novel approach of recognizing hand number gestures using the recognized hand parts in a depth image. Our proposed approach is divided into two stages: (i) hand parts recognition by random forests (RFs) and (ii) rule-based hand number gestures recognition. In the first stage, we create a database (DB) of synthetic hand depth silhouettes and their corresponding hand parts-labeled maps and then train RFs with the DB. Via the trained RFs, we recognize or label the hand parts in a depth silhouette. In the second stage, based on the information of the recognized or labeled hand parts, hand number gestures are recognized according to our derived rules. In our experiments, we quantitatively and qualitatively evaluated our hand parts recognition system with synthetic and real data. Then, we tested our hand number gesture recognition system with real data. Our results show the average recognition rate of 97.80 % over the ten hand number gestures from five different subjects.