INFORMATION NECESSITY/NON-NECESSITY LEARNING ESTIMATION DEVICE, INFORMATION NECESSITY/NON-NECESSITY LEARNING ESTIMATION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To accurately estimate probability that a user needs information.;SOLUTION: The information necessity/non-necessity learning estimation device includes: a necessity/non-necessity extraction part for acquiring the action of a user, and for, when information is requested, outputting "necessity", and for, otherwise, outputting "non-necessity" as necessity/non-necessity information c; an action characteristic extraction part for extracting an action characteristic time sequence x from a moving image obtained by photographing a user; an action characteristic storage part for storing the combination of the necessity/non-necessity information c with the action characteristic time sequence x just before the acquisition of the necessity/non-necessity information c as action characteristic data d; an action characteristic generation probability calculation part for acquiring the action characteristic time sequence x, and for calculating a parameter θ_j whose j-th action characteristic time sequence x_j is the maximum likelihood, and for, when the k-th action characteristic time sequence is x_k, calculating action characteristic generation probability p(x_k|θ_j) with respect to arbitrary j, k; a voting rate calculation part for acquiring the p(x_k|θ_j) with respect to the arbitrary j, k and action characteristic data d, and for calculating a voting rate p(c'|θ_j) with respect to the arbitrary j; and a voting rate storage part for storing the voting rate p(c'|θ_j).;COPYRIGHT: (C)2012,JPO&INPIT