Image Annotation and Retrieval-An Overview

Structured knowledge models, such as semantic hierarchies and ontologies, appear to be a way to improve the accuracy of automatic image annotation. It allows modeling many valuable semantic relations between concepts based on image annotation using contextual and spatial relationships. Indeed, these relationships have been proved to be of prime importance for the understanding of image semantics. Moreover, such structured knowledge models about high-level concepts enable to reduce the complexity of the large-scale image annotation problem. The proposed paper discusses the different methods for the task of image annotation and retrieval.