IR surface reflectance estimation and material type recognition using two-stream net and kinect camera.

Recently, material type recognition using color or light field camera has been studied. However, visual pattern based approaches for material type recognition without direct acquisition of surface reflectance show limited performance. In this work, we propose IR surface reflectance estimation using off-the-shelf ToF (Time-of-Flight) active sensor such as Kinect and perform surface material type recognition based on both color and reflectance clues. Two stream deep neural network consists of convolutional neural network encoding visual clue and recurrent neural network encoding reflectance characteristic is proposed for material classification. Estimated IR surface reflectance and material type recognition evaluation on our Color-IR Material Data set show promising performance compared to prior approaches.