Signature matching method and apparatus

A computer program product for execution by a processor, the computer program product tangibly embodied in an information carrier comprising a machine-readable storage device, the computer program product including instructions being operable to cause a data processing apparatus to:

• receive a first target profile associated with a first data signal, the first data signal associated with a first target object;
• receive a second target profile associated with a second data signal, the second data signal associated with the first target object or a second target object;
• generate a comparison distance utilizing a comparison distance function and based on a comparison of one or more data points associated with the first target profile and one or more data points associated with the second target profile;
• and
• determine a signature matching score based on the comparison distance, wherein determining the signature matching score further comprises:
• generating a ratio based on the comparison distance,
• selecting a likelihood ratio based on the ratio determined from the comparison distance, wherein the likelihood ratio associated with a match probability density function and a mis-match probability density function,
• wherein the determining the signature matching score based on the comparison distance further comprising determining the signature matching score based on the comparison distance and the selected likelihood ratio.

A system for signature matching, the system comprising:

• a communication module configured to:
• receive a first target profile associated with a first data signal, the first data signal associated with a first target object, and
• receive a second target profile associated with a second data signal, the second data signal associated with the first target object or a second target object;
• a distance comparison module configured to generate a comparison distance utilizing a comparison distance function and based on a comparison of one or more data points associated with the first target profile and one or more data points associated with the second target profile;
• a signature matching score module configured to determine a signature matching score based on the comparison distance, wherein the signature matching score module is further configured to generate a ratio based on the comparison distance function;
• and
• a likelihood ratio generation module configured to select a likelihood ratio based on the ratio determined from the comparison distance, wherein the likelihood ratio associated with a match probability density function and a mis-match probability density function,
• wherein the signature matching score module further configured to determine the signature matching score based on the comparison distance function and the selected likelihood ratio.

A system for signature matching, the system comprising:

• means for receiving a first target profile associated with a first data signal, the first data signal associated with a first target object;
• means for receiving a second target profile associated with a second data signal, the second data signal associated with the first target object or a second target object;
• means for generating a comparison distance utilizing a comparison distance function and based on a comparison of one or more data points associated with the first target profile and one or more data points associated with the second target profile;
• and
• means for determining a signature matching score based on the comparison distance, wherein determining the signature matching score further comprises:
• generating a ratio based on the comparison distance,
• selecting a likelihood ratio based on the ratio determined from the comparison distance, wherein the likelihood ratio associated with a match probability density function and a mis-match probability density function, and
• wherein the determining the signature matching score based on the comparison distance further comprising determining the signature matching score based on the comparison distance and the selected likelihood ratio.