| 摘要 |
PROBLEM TO BE SOLVED: To provide a linear transformation matrix calculation device for obtaining a linear transformation matrix wherein similarity between partial spaces belonging to different categories is increased and wherein similarity between partial spaces belonging to the same category is reduced. SOLUTION: The linear transformation matrix calculation device linearly transforms a plurality of dictionary partial spaces each belonging to each category by a linear transformation matrix, selects a plurality of sets of combinations each between two dictionary partial spaces from the plurality of linearly transformed dictionary partial spaces, calculates a loss function by use of each similarity between the dictionary partial spaces of each selected set, calculates a differential parameter when differentiating the loss function with respect to the linear transformation matrix, calculates a new linear transformation matrix by the differential parameter and the linear transformation matrix by a steepest descent method, and updates the new linear transformation matrix as the linear transformation matrix used in a linear transformation part. COPYRIGHT: (C)2010,JPO&INPIT
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