*Article* **Image Super-Resolution Based on CNN Using Multilabel Gene Expression Programming**

**Jiali Tang 1, Chenrong Huang 2,\*, Jian Liu <sup>1</sup> and Hongjin Zhu <sup>1</sup>**


Received: 25 December 2019; Accepted: 23 January 2020; Published: 25 January 2020

**Abstract:** Current mainstream super-resolution algorithms based on deep learning use a deep convolution neural network (CNN) framework to realize end-to-end learning from low-resolution (LR) image to high-resolution (HR) images, and have achieved good image restoration effects. However, as the number of layers in the network is increased, better results are not necessarily obtained, and there will be problems such as slow training convergence, mismatched sample blocks, and unstable image restoration results. We propose a preclassified deep-learning algorithm (MGEP-SRCNN) using Multilabel Gene Expression Programming (MGEP), which screens out a sample sub-bank with high relevance to the target image before image block extraction, preclassifies samples in a multilabel framework, and then performs nonlinear mapping and image reconstruction. The algorithm is verified through standard images, and better objective image quality is obtained. The restoration effect under different magnification conditions is also better.

**Keywords:** super-resolution (SR); convolution neural network (CNN); Gene Expression Programming (GEP); deep learning; image preclassification
