8. A computer-readable storage device storing computer-executable instruction for controlling a computing device to recognize a target object, by a method comprising: for each of a plurality of objects, for each of a plurality of classifiers, providing a representative code vector for that classifier for that object, the representative code vector generated from a classifier-specific feature vector derived from patterns of that object; receiving a target pattern of the target object; and recognizing the target object by: for each of the plurality of classifiers, generating by a computing device a classifier-specific feature vector for that classifier from the target pattern of the target object; generating by a computing device a target code vector for that classifier from the generated classifier-specific feature vector of that classifier; for each of a plurality of objects, generating by a computing device an overall score indicating that the target object is that object by generating for each classifier a classifier score from the target code vector and the representative code vector for that classifier for that object and combining the classifier scores into the overall score for that object.
8. A computer-readable storage device storing computer-executable instruction for controlling a computing device to recognize a target object, by a method comprising: for each of a plurality of objects, for each of a plurality of classifiers, providing a representative code vector for that classifier for that object, the representative code vector generated from a classifier-specific feature vector derived from patterns of that object; receiving a target pattern of the target object; and recognizing the target object by: for each of the plurality of classifiers, generating by a computing device a classifier-specific feature vector for that classifier from the target pattern of the target object; generating by a computing device a target code vector for that classifier from the generated classifier-specific feature vector of that classifier; for each of a plurality of objects, generating by a computing device an overall score indicating that the target object is that object by generating for each classifier a classifier score from the target code vector and the representative code vector for that classifier for that object and combining the classifier scores into the overall score for that object. 12. The computer-readable storage device of claim 8 wherein a representative code vector for an object for a classifier is generated from clusters of code vectors for that object for that classifier.