Signal processing device and method, and recording medium

A picture processing method for processing picture data made up of a predetermined number of pixel data acquired by an imaging device having a predetermined number of pixels each having an integrating effect, said picture processing method comprising:

• a processing unit decision step of deciding, based on area information specifying a foreground area made up only of foreground object components making up a foreground object in said picture data, a background area made up only of background object components making up a background object in said picture data, and a mixed area which is a mixture of said foreground object components and the background object components in said picture data, said mixed area including a covered background area formed at a leading end in a movement direction of said foreground object, and an uncovered background area formed at a trailing end of said foreground object, a processing unit made up of pixel data lying on at least a straight line extending in a direction coincident with the direction of movement of said foreground object from an outer end of said covered background area to an outer end of said uncovered background area, centered about said foreground area;
• a normal equation generating step of generating a normal equation by setting pixel values of pixels in said processing unit decided based on said processing unit and a dividing value which is an unknown dividing value obtained on dividing said foreground object components in said mixed area with a predetermined dividing number;
• and
• a calculating step of solving said normal equation by the least square method to generate foreground object components adjusted for the quantity of movement blurring.

A picture processing program for processing picture data made up of a predetermined number of pixel data acquired by an imaging device having a predetermined number of pixels each having an integrating effect, said picture processing program comprising:

• a processing unit decision step of deciding, based on area information specifying a foreground area made up only of foreground object components making up a foreground object in said picture data, a background area made up only of background object components making up a background object in said picture data, and a mixed area which is a mixture of said foreground object components and the background object components in said picture data, said mixed area including a covered background area formed at a leading end in a movement direction of said foreground object, and an uncovered background area formed at a trailing end of said foreground object, a processing unit made up of pixel data lying on at least a straight line extending in a direction coincident with the direction of movement of said foreground object from an outer end of said covered background area to an outer end of said uncovered background area, centered about said foreground area;
• a normal equation generating step of generating a normal equation by setting pixel values of pixels in said processing unit decided based on said processing unit and a dividing value which is an unknown dividing value obtained on dividing said foreground object components in said mixed area with a predetermined dividing number;
• and
• a calculating step of solving said normal equation by the least square method to generate foreground object components adjusted for the quantity of movement blurring.

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.

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

• area specifying means for specifying a foreground area made up only of foreground object components constituting an foreground object, a background area made up only of background object components constituting a background object, and a mixed area mixed from said foreground object components and the background object components;
• mixing ratio detection means for detecting a mixing ratio of said foreground object components and said background object components at least in said mixed area;
• and
• separating means for separating said foreground object and said background object from each other based on the specified results by said area specifying means and said mixing ratio.

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

• an area specifying step of specifying a foreground area, made up only of foreground object components constituting an foreground object, a background area made up only of background object components constituting a background object, and a mixed area mixed from said foreground object components and the background object components;
• a mixed area detection step of detecting a mixing ratio of said foreground object components and said background object components at least in said mixed area;
• and
• a separating step of separating said foreground object and said background object from each other based on the specified results by said area specifying means and said mixing ratio.

A recording medium having a computer-readable program, recorded thereon, said computer-readable program comprising:

• an area specifying step of specifying a foreground area, made up only of foreground object components constituting an foreground object, a background area made up only of background object components constituting a background object, and a mixed area mixed from said foreground object components and the background object components;
• a mixed area detection step of detecting a mixing ratio of said foreground object components and said background object components at least in said mixed area;
• and
• a separating step of separating said foreground object and said background object from each other based on the specified results by said area specifying means and said mixing ratio.