Improved nonlinear resolution enhancement based on Laplacian pyramid

In this paper, an improved nonlinear resolution enhancement scheme based on Laplacian pyramid is proposed, which incorporates the peak sharpening technique into conventional nonlinear resolution enhancement methods. In the proposed scheme, the peak sharpening algorithms are firstly introduced to narrow the component with the shape preserved. Then the higher frequency component is generated by a nonlinear process based on the peak sharpening results. Simulation results indicate that the proposed improved algorithm obtains a better subjective quality and objective performance than conventional nonlinear resolution enhancement methods.