19-6 Simulation for Reconstruction of Two-dimensional Image Beyond Nyquist Frequency Using Low-pass Filters

Abstract

Resolution progress of image sensor by digital signal processing was simulated on computer. By this method, high-resolution images that have high spacial frequency beyond the Nyquist frequency can be obtained. Simulated imaging device is area charge-coupled device (CCD) image sensor. After the simulation, reproduced images which have frequency components twice higher than Nyquist frequency are successfully obtained. Using this method, it is possible to enhance the resolution of CCD image sensor twice as high as its inherent resolution.