An Asymmetric Approach to Signature Matching.

The image signature concept can be a successful approach to image comparison in content-based retrieval, but it is a very challenging task. Fundamental for this purpose is defining signature similarity. There exist a lot of similarity models which measure similarity of images or their objects in multimedia databases. In order to deal with semantic retrieval, we have introduced a three stage search engine. At each stage, we need different but equally effective similarity measures. Here, we have analysed asymmetric and symmetric approaches to signature comparison. In our experiment, we present an extensive comparison of some similarity measures dedicated to image retrieval.