Apparatus and method for abstracting motion picture shape descriptor including statistical characteristic of still picture shape descriptor, and video indexing system and method using the same

A system for retrieving motion picture, comprising:

• a first motion picture shape descriptor abstracting means for abstracting a first motion picture shape descriptors for motion picture;
• a motion picture storing means for storing the motion picture;
• a motion picture shape descriptor metadata storing means for storing the first motion picture shape descriptor;
• and
• a motion picture retrieving means for calculating the similarity between the first motion picture shape descriptor abstracted from the motion picture shape descriptor abstracting means and a second motion picture shape descriptor outputted from the motion picture shape descriptor metadata storing means, arranging the motion picture shape descriptor in the order of similarity from small to large, and outputting similar motion pictures,
• wherein the first motion picture shape descriptor and the second motion picture shape descriptor are abstracted by using one or combination of a mean shape descriptor, a variance shape descriptor, a standard deviation shape descriptor and a differential shape descriptor,
• wherein the mean shape descriptor is obtained based on an Equation as:
• sdav(m)=(Σi=l to nsdi(m))/n,
• wherein sdi={sdi(1), sdi(2), sdi(3), . . . , sdi(m)},
• wherein the variance shape descriptor is obtained based on an Equation as:
• sdvar(m)=(Σi=l to n(sdi(m)−sdav(m))2)/n/(n−1)
• wherein sdav(m)=(Σi=l to n sdi(m))/n, and sdi={sdi(1), sdi(2), sdi(3), . . . , sdi(m)}.

A method for abstracting a motion picture shape descriptor having statistical characteristics of still picture shape descriptors to be applied to a motion picture shape descriptor abstracting apparatus, the method comprising the steps of:

• a) segmenting a motion picture temporally and abstracting shape information corresponding to one object from the temporally segmented motion picture;
• b) abstracting a motion picture shape descriptor, which is a statistical shape vector descriptor, from the shape information;
• c) storing the motion picture shape descriptor in a motion picture metadata storing means,
• d) abstracting a shape vector descriptor sequence from the abstracted shape information of motion picture in order to abstract the motion picture shape descriptor;
• and
• e) abstracting a motion picture shape descriptor, which is a statistical shape vector descriptor, from the shape vector descriptor sequence,
• wherein the motion picture shape descriptor, which is a statistical shape vector descriptor of the step e), can be obtained based on an Equation as:
• sdav(m)=(Σi=l to nsdi(m))/n ,
• wherein sdi={sdi(1), sdi(2), sdi(3), . . . , sdi(m)},
• wherein the motion picture shape descriptor can be obtained based on an Equation as;
• sdvar(m)=(Σi=l to n(sdi(m)−sdav(m))2)/n/(n−1),
• wherein sdav(m)=(Σi=l to n sdi(m))/n, and sdi={sdi(1), sdi(2), sdi(3), . . . , sdi(m)}.

A computer-based recording medium encoded with (stored thereon, embedded with, or embodying), causing a computer to execute a method for abstracting motion picture shape descriptors, the method comprising the steps of:

• a) segmenting a motion picture temporally and abstracting shape information corresponding to one object from the temporally segmented motion picture;
• b) abstracting a motion picture shape descriptor, which is a statistical shape vector descriptor, from the shape information;
• and
• c) storing the motion picture shape descriptor in a motion picture metadata storing means,
• wherein the program is implemented in a motion picture shape descriptor abstracting apparatus provided with a processor,
• wherein the motion picture shape descriptor is abstracted by using one or combination of a mean shape descriptor, a variance shape descriptor, a standard deviation shape descriptor and a differential shape descriptor,
• wherein the mean shape descriptor is obtained based on an Equation as:
• sdav(m)=(Σi=l to nsdi(m))/n,
• wherein sdi={sdi(1), sdi(2), sdi(3), . . . , sdi(m)},
• wherein the motion picture shape descriptor is obtained based on an Equation as:
• sdvar(m)=(Σi=l to n(sdi(m)−sdav(m))2)/n(n−1),
• wherein sdav(m)=(Σi=l to n sdi(m))/n, and sdi={sdi(1), sdi(2), sdi(3), . . . , sdi(m)}.