Patent ID: 6370485
Filing Date: 2002-04-09
Classification: G01N

Abstract:
A signal processing apparatus comprising:a 2-dimensional conversion processing section which maps an observation signal in a first coordinate system into a second coordinate system to output a 2-dimensional converted signal, wherein said observation signal includes a detection object component and a noise component to be reduced, and said noise component is composed of a first noise component and a second noise component; a 2-dimensional identification and reduction processing section which reduces said first noise component of said 2-dimensional converted signal to identify said detection object component thereof and outputs a 2-dimensional filtered signal in which said detection object component is identified from said noise component; and a 2-dimensional smoothing processing section which reduces said second noise component contained in said 2-dimensional filtered signal, and outputs a 2-dimensional smoothed signal, whereby a detection object can be detected based on said 2-dimensional smoothed signal.