HNSR: Highway Networks Based Deep Convolutional Neural Networks Model for Single Image Super-Resolution

Convolutional neural networks (CNNs) have been widely used in computer vision community. Single image super-resolution (SISR) is a classic computer vision problem, which aims to output a high-resolution image from a low-resolution one. In recent years, CNNs-based SISR methods emerged and achieved a performance leap. In this paper, we present a highly accurate deep CNNs model for SISR. Inspired by the ideas in highway networks, we propose a highway unit and cascade highway units to ensemble our model. Furthermore, we employ structural similarity index (SSIM) as a part of loss function to enhance the accuracy of trained deep CNNs model. Experimental results show that our proposed model outperforms other state-of-the-art methods.