Object measuring apparatus, object measuring method, and program product

An object measuring method for measuring the number of moving objects passing a boundary line, comprising the steps of:

• (a) extracting motion vectors at a plurality of times in each of a plurality of positions on said boundary line on the basis of a plurality of images;
• (b) obtaining at least one integral value derived by integrating perpendicular components perpendicular to said boundary line of said motion vectors, said at least one integral value being derived by integrating the perpendicular components of one of positive and negative signs;
• and
• (c) calculating the number of moving objects passing said boundary line on the basis of said at least one integral value.

A program residing on a recording medium that can be read by a computer provided in a controller in an object measuring system for measuring the number of moving objects passing a boundary line, the program executing the steps of:

• (a) extracting motion vectors at a plurality of times in each of a plurality of positions on said boundary line on the basis of a plurality of images;
• (b) obtaining at least one integral value derived by integrating components perpendicular to said boundary line of said motion vectors, said at least one integral value being derived by integrating the perpendicular components of one of positive and negative signs;
• and
• (c) calculating the number of moving objects passing said boundary line on the basis of said at least one integral value.

An object measuring system for measuring the number of moving objects passing a boundary line, comprising:

• an extractor for extracting motion vectors at a plurality of times in each of a plurality of positions on said boundary line on the basis of a plurality of images;
• an integrator for obtaining an integral value by integrating components perpendicular to said boundary line of said motion vectors;
• and
• a calculator for calculating the number of moving objects passing said boundary line on the basis of said at least one integral value and a reference value regarding the integral value.

An object measuring method for measuring the number of moving objects passing a boundary line, comprising the steps of:

• (a) extracting motion vectors at a plurality of times in each of a plurality of positions on said boundary line on the basis of a plurality of images;
• (b) obtaining an integral value by integrating components perpendicular to said boundary line of said motion vectors;
• and
• (c) calculating the number of moving objects passing said boundary line on the basis of said integral value and a reference value regarding the integral value.

A program residing on a recording medium that can be read by a computer provided in a controller in an object measuring system for measuring the number of moving objects passing a boundary line, the program executing the steps of:

• (a) extracting motion vectors at a plurality of times in each of a plurality of positions on said boundary line on the basis of a plurality of images;
• (b) obtaining an integral value by integrating components perpendicular to said boundary line of said motion vectors;
• and
• (c) calculating the number of moving objects passing said boundary line on the basis of said integral value and a reference value regarding the integral value.