Arts computing 1 CNN 1 Computational costs 1 Convolution 1 Convolutional neural network 1 Convolutional neural networks 1 Group convolution Image enhancement 1 Image super resolutions 1 Image super-resolution 1 Improve performance 1 Learning abilities 1 Lower frequencies 1 Network architecture 1 Optical resolving power 1 Signal processing 1 Signal-processing 1 Single images 1 Superresolution 1 article 1 convolutional neural network 1 image quality 1 signal processing 1 velocity 1