| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for acquiring an observation signal by filtering out unnecessary signals from the observation signal. <P>SOLUTION: A plurality of signals are observed at spatially different positions, and the signals are subjected to independent component analysis to determine a mix matrix and independent component signals. Absolute valuesα1-αn of the standard deviation coefficients of the array vectors of the determined mix matrix are acquired, and the array vectors equal to or less than (optionally, less than) a threshold c are considered to be 0 so as to filter out signals corresponding to unnecessary components. An observation signal is then calculated using formula (1) (not shown). With such a method, an observation signal without signals based on unnecessary components, such as skin blood flow or the like, can be acquired. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
