KIMEL: A kernel incremental metalearning algorithm

The Kernel method is a powerful tool for extending an algorithm from linear to nonlinear case. Metalearning algorithm learns the base learning algorithm, thus to improve performance of the learning system. Usually, metalearning algorithms exhibit faster convergence rate and lower Mean-Square Error (MSE) than the corresponding base learning algorithms. In this paper, we present a kernelized metalearning algorithm, named KIMEL, which is a metalearning algorithm in the Reproducing Kernel Hilbert Space (RKHS). The convergence analyses of the KIMEL algorithm are performed in detail. To demonstrate the effectiveness and advantage of the proposed algorithm, we firstly apply the algorithm to a simple example of nonlinear channel equalization. Then we focus on a more practical application in blind Image Quality Assessment (IQA). Experimental results show that the KIMEL algorithm has superior performance.