Semantic Classification and Annotation of Images

With.the.rapid.growth.of.image.collections,.content-based.image.retrieval.(CBIR).has.been.an.active. area.of.research.with.notable.recent.progress..However,.automatic.image.retrieval.by.semantics.still. remains.a.challenging.problem.. In. this.chapter,. the.authors.will.describe. two.promising. techniques. towards semantic image retrieval—semantic image classification and automatic image annotation. For each technique, four aspects are presented: task definition, image representation, computational models, and.evaluation..Finally,.they.will.give.a.brief.discussion.of.their.application.in.image.retrieval.