Light Field Reconstruction using Hierarchical Features Fusion

•U-Net can architecture to extract hierarchical features.•SAS can extract spatial and angular features for the 4D light field.•U-Net and SAS are combined into U-SAS-Net to take advantages of the two.•U-SAS-Net achieves 0.62 db better and 10x faster than state-of-the-art.•A large patch size is proved to be beneficial for learning the light field.