Traffic Density Estimation R05943148 Jia-Yau Shiau

Agenda Problem Definition Challenges & Possible Approaches Results of State-of-the-art Detector Results of Density Estimator Future Works

Traffic Density Estimation

Vehicle Detector VD

How About Camera VD VD VD

Close Circuit Traffic Camera (CCTV)

Challenges Low frame rate Low resolution High occlusion Large perspective

Possible Approaches Detector & Tracker Whole frame estimation

fasterRCNN Deforamable FPN OHEM loss

Deformable CNN Model geometric transformation FPN + OHEM Deformable convolution Deformable RoI pooling FPN + OHEM

Retina-Net Single Stage detector Fusion model with FPN and Res-Net New loss function: focal loss

Scene 1 Retina-Net Deformable CNN

Scene 2 Retina-Net Deformable CNN

Density Map & Optical Flow

Convolution & Transpose

Scene 1