Patent ID: 6160900
Filing Date: 2000-12-12
Classification: G01S,G06T,H04N

Abstract:
A method for investigating a second data series, corresponding to a first data series in a first data group, from a second data group including the second data series, said method comprising:a first selecting step of selecting, from the second data group, a first investigation area;a first thinning step of thinning out data elements in the first investigation area by a first thin out quantity to thereby provide a plurality of first comparing data series;a first comparing step of comparing the first data series with each of the first comparing data series by calculating respective differences between data elements in the first data series and respective data elements in each of the first comparing data series, comparing each such difference with a first predetermined value to provide first quantized data, and selecting at least one of the plurality of first comparing data series based on the first quantized data;a second selecting step of selecting, from the second data group, a second investigation area including the selected first comparing data series and excluding any non-selected first comparing data series;a second thinning step of thinning out data elements in the second investigation area by a second thinning out quantity to thereby provide a plurality of second comparing data series, the second thinning out quantity being no greater than the first thinning out quantity; anda second comparing step of comparing the first data series with each of the second comparing data series by calculating respective differences between data elements in the first data series and respective data elements in each of the second comparing data series, comparing each such difference with a second predetermined value not greater than the first predetermined value to provide second quantized data, and selecting a final data series including at least one of the plurality of second comparing data series based on the second quantized data.