A retrieval apparatus allows keywords to be attached simply and automatically. A feature quantity extractor 15 extracts feature quantities of a registration-target image to obtain a p-dimensional feature vector. A vector converter 16 multiplies the p-dimensional feature vector with a canonical correlation...http://www.google.de/patents/US6480841?utm_source=gb-gplus-sharePatent US6480841 - Information processing apparatus capable of automatically setting degree of relevance between keywords, keyword attaching method and keyword auto-attaching apparatus
