FEATURE CONVERSION DEVICE AND FEATURE CONVERSION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a feature conversion device for calculating a conversion matrix W minimizing a bit coding error while suppressing calculation costs.SOLUTION: A feature conversion device 10 for converting the feature vectors of digital information into bit codes includes: a conversion matrix generation part 13 for generating a conversion matrix consisting of a plurality of conversion vectors for converting feature vectors into bit codes by using a plurality of feature vectors for learning; and a bit code conversion part 12 for converting the feature vectors into the bit codes by using the conversion matrix. The conversion matrix generation part 13 calculates an error occurrence rate due to the conversion of the plurality of feature vectors for learning into the bit codes, and generates the conversion matrix by using the error occurrence rate as a cost function.