Cerebrus Solutions Limited

Kate Butchart

Derek M Dempsey

A method for operating a data classifier operable to generate an element of output data in response to an element of input data, such as a neural network, is disclosed. The method includes using the data classifier to generate elements of result output data in response to elements of test input data, generating a measure of difference between each element of test output data and each corresponding element of result output data, associating the measures of difference with categories corresponding to different values of measures of difference, and, based on the number of measures of difference associated with the categories, generating a performance measure of the data classifier.

Performance assessment of data classifiers

A method for assessing the performance of a data classifier operable to generate an element of output data in response to an element of input data, such as a neural network, is disclosed. The method includes using the data classifier to generate elements of result output data in response to elements of test input data, determining a measure of difference between each element of test output data and each corresponding element of result output data, forming a distribution function of the measures of differences, and forming a measure of performance from the distribution function.

A method, apparatus, and computer software are provided whereby to associate a readily user-interpretable reason with an output of a supervised training data classifier. Reasons are associated with one or more members of a sequence of training vectors and subsequently associated, in operation, with a given classifier input by comparing the classifier input vector with training sequence vectors. A measure of confidence in the selected reasons is derived by comparing the classifier input vector with the corresponding training inputs with which the selected reasons were associated and calculating a measure of their closeness.

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Stevenage, United Kingdom

Kate Butchart