A new signal processing method for video image-reproduce the frequency spectrum exceeding the Nyquist frequency using a single frame of the video image

Abstract

A new non-linear signal processing method is proposed in this paper. Enhancers are widely used in real time signal processing machines to improve the image quality. It does not actually increase the resolution but improves the degree of resolution as perceived by the human eye. It is almost impossible to create components exceeding the Nyquist frequency using conventional linear signal processing methods. Super Resolution (SR) is a highly interesting research field and many ideas and methods have been proposed and some of which have the potential to enhance resolution. However, most of these ideas use several frames of video images and they have not been widely discussed in the frequency domain. The new signal processing method in this paper uses just a single frame of the video image and creates components exceeding the Nyquist frequency. The simulation results are discussed with regard to the picture quality well as the frequency domain.