Özet:

Image Retrieval System (IRS) is commonly based on searching keywords in the surrounding text of images by employing content-independent metadata, or data that is not directly concerned with image content. Content Based Image Retrieval (CBIR) focuses on image features, as it extracts image features such as dominant color, color histogram, texture, and object shape. The main problem with CBIR is the semantic gap between low-level image features and high-level human-understandable concepts. There is a lack of agreement between information that is extracted from visual data and the text description. Ontologies are at the heart of all Semantic Web applications, representing domain concepts and relations in the form of a semantic network. In this study, we applied ontology to bridge the semantic gap by developing a prototype multi-modality ontology IRS based on sports news and by integrating it with DBpedia to enrich the knowledge base while overcoming the problem of semantic heterogeneity. We evaluate our approach using precision and recall and compare this approach with single modality ontology. The results show that multi-modality ontology IRS give high precision (P) and recall (R) compared to visual-based ontology and keyword-based ontology.

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