A method or computing device for configuring parameters of a feature extractor

A METHOD OF CONFIGURING ONE OR MORE FEATURE EXTRACTORS Abstract 5 A method of configuring parameters of a feature extractor for a classifier, the method comprising: generating representations of a positive and a negative training sample by applying the feature extractor to the positive and negative training sample respectively, wherein the feature extractor is configured with initial values for the parameters; determining, independently of any negative training sample, a first change of the parameters according to 10 the representation of the positive training sample, the first change of parameters being selected to improve a fidelity of the representation of the positive training sample; determining, independently of any positive training sample, a second change of the parameters according to the representation of the negative training sample, the second change of parameters being selected to reduce a magnitude of the representation of the negative training sample; and 15 adjusting the parameters of the feature extractor according to the first and second change of parameters. #9466200 (Wide-Area) Communications Network 1320 Microphone 1324 1380 1321 0,* I.\ 1317 (Local-Area) Video Communications Display Ext Network 1322 1314 Mo31e 1323-o Priocesor 1/ InterfaceI M cal DiSk 1305HD 1333301Div 132 Keyoar 1304 Scanner 1326 Disk Storage 1303 Medium 1325 Camera 1327