Signal processing method and apparatus and recording medium

A signal processing apparatus for processing detection data, acquired every predetermined time period by a sensor made up of a predetermined number of detection elements having time-integrating effects, every predetermined time period, said signal processing apparatus comprising:

• foreground sample data extracting means for extracting said sample data present in detection data before or after considered detection data where there exists considered sample data which is the sample data under consideration, as foreground sample data corresponding to an object proving the foreground in the real world;
• background sample data extracting means for extracting said sample data present in detection data lying after or before the considered detection data where there exists considered sample data which is the sample data under consideration, as background sample data corresponding to an object proving the background in the real world;
• and detection means for detecting a mixing ratio of said considered sample data based on said considered sample data, said foreground sample data and said background sample data.

A signal processing method for processing detection data, acquired every predetermined time period by a sensor made up of a predetermined number of detection elements having time-integrating effects, every predetermined time period, said signal processing method comprising:

• a foreground sample data extracting step of extracting said sample data present in detection data before or after considered detection data where there exists considered sample data which is the sample data under consideration, as foreground sample data corresponding to an object proving the foreground in the real world;
• a background sample data extracting step of extracting said sample data present in detection data lying after or before the considered detection data where there exists considered sample data which is the sample data under consideration, as background sample data corresponding to an object proving the background in the real world;
• and a detection step of detecting a mixing ratio of said considered sample data based on said considered sample data, said foreground sample data and said background sample data.

A signal processing program for processing detection data, acquired every predetermined time period by a sensor made up of a predetermined number of detection elements having time-integrating effects, every predetermined time period, said signal processing program comprising:

• a foreground sample data extracting step of extracting said sample data present in detection data before or after considered detection data where there exists considered sample data which is said sample data under consideration, as foreground sample data corresponding to an object proving the foreground in the real world;
• a background sample data extracting step of extracting said sample data present in detection data lying after or before the considered detection data where there exists considered sample data which is the sample data under consideration, as background sample data corresponding to an object proving the background in the real world;
• and a detection step of detecting a mixing ratio of said considered sample data based on said considered sample data, said foreground sample data and said background sample data.

19-45. (canceled)

A signal processing apparatus comprising:

• means for acquiring second signals of a second dimension by projecting first signals as real-world signals of a first dimension on a sensor and by detecting mapped signals by said sensor, said first dimension being lower than said second dimension;
• and signal processing means for extracting significant information from said second signals, buried by said projection, by performing signal processing based on said second signals, wherein said signal processing means extracts, as said significant information, a mixing ratio of foreground object components and background object components in a mixed area of said second signal made up of a foreground area comprised only of foreground object components constituting the foreground object, a background area comprised only of background object components constituting the background object and a mixed area mixed from said foreground object components and said background object components, and wherein said signal processing means extracts said mixing ratio as said significant information based on said second signal and extracts said area information indicating said foreground area, background area and the mixed area from said second signal as said significant information.

51-84. (canceled)