An experiment of image Sensing beyond Nyquist rate using a CCD With insufficient pixels

Abstract

It is concidered that the resolution of the CCD imager is limited by Nyquist rate determined as a half of the pixel number of the CCD. High spacial frequency components of the input image above Nyquist rate generate aliasing. The aliasing pattern contains informations of the high frequency components of the input image. Therefore by turning up the frequency components of the aliasing from low to high frequency, the original image can be reconstructed beyond Nyquist rate.