Patent ID: 6507859
Filing Date: 2003-01-14
Classification: G06F,G06T

Abstract:
A signal processing method for removing from a plurality of discrete signals, obtained by sampling an identical or substantially identical continuous signal using sampling phases differing in one-dimensional or two-dimensional directions and including a basic spectral component and imaging components other than the basic spectral component included in the continuous signal, the imaging components and generating a signal in accordance with the basic spectral component, comprising the steps of:inputting the plurality of discrete signals including aliasing and differing in sampling phases and the value of the sampling phase difference, generating complex simultaneous equations having the basic spectral component and imaging components as variables, having an amount determined by the phase difference as a coefficient of the imaging components, and having the frequency domain expression of the input signal as a constant, solving the complex simultaneous equations, transforming the input signals to the frequency domain, multiplying complex numbers with the frequency domain expressions of the input signals based on the solutions to the complex simultaneous equations, and adding the results of the multiplication of the complex numbers with the frequency domain expressions of the input signals so as to obtain a signal free of aliasing.