A modified shape descriptor in wavelets compressed domain
نویسندگان
چکیده
In order to effectively and efficiently implement shape-based image retrieval in wavelet domain, a new method is introduced in this paper to improve moment-based shape descriptor. Firstly, several morphological operations are used to incorporate isolated significant points of wavelet coefficients domain into a meaningful object region, which leads to a more accurate shape description. Then, by using the invariant properties of certain moments, a compact moment representation method is also proposed to integrate shape information spread at various directional wavelet subbands. Experimental results show that the proposed algorithm outperforms the existing shapebased image retrieval method in wavelet domain.
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