Abstract: A method for detecting a face in an image includes the steps of applying the image to a first classification tool that determines a rotational angle for rotating the image that makes the image most resemble an upright face; rotating the image by the rotational angle determined by the first classification tool; and applying the rotated image to a second classification tool, which determines whether the rotated image represents a frontal face or not.

Abstract: A method for filling in missing attribute values in a data set array of cases and attribute positions includes the steps of, for a first case which includes an empty attribute position, determining a first set of K nearest neighbor cases which have known values for the corresponding attribute position as the empty attribute position in the first case; determining a filled in attribute value from the first set of K nearest neighbor cases for the empty attribute position of the first case; determining a second set of K nearest neighbor cases to the first case which have known values for the corresponding attribute position as the empty attribute position in the first case; and revising the filled in attribute value of the first case with an attribute value determined from the second set of K nearest neighbor cases. The revision process is typically repeated until the filled in values stop improving or until a preset limit on the number of iterations is reached.

Abstract: A method for transforming an original message into a final message by including an untrusted service, includes the steps of identifying at least one sensitive term from the original message; replacing the at least one sensitive term with a standard token to create a sanitized message; storing the at least one sensitive term; transmitting the sanitized message to a provider of the untrusted service; performing the untrusted service on the sanitized message to create a serviced message; merging the serviced message with the at least one sensitive term stored in the storing step to create the final message.