Visual Concept Ontology for Image Annotations
This work addresses the need for better image annotation in multimedia retrieval, but it is incremental as it builds on existing semantic resources like WordNet.
The paper tackles the problem of automatic text metadata creation for image retrieval by introducing the Visual Concept Ontology (VCO), a new ontology linked to WordNet, which helps annotation tools integrate semantic knowledge from structured resources to improve findability.
In spite of the development of content-based data management, text-based searching remains the primary means of multimedia retrieval in many areas. Automatic creation of text metadata is thus a crucial tool for increasing the findability of multimedia objects. Search-based annotation tools try to provide content-descriptive keywords by exploiting web data, which are easily available but unstructured and noisy. Such data need to be analyzed with the help of semantic resources that provide knowledge about objects and relationships in a given domain. In this paper, we focus on the task of general-purpose image annotation and present the VCO, a new ontology of visual concepts developed as a part of image annotation framework. The ontology is linked with the WordNet lexical database, so the annotation tools can easily integrate information from both these resources.