Abstract
An image retrieval method based on curvature feature and entropy-matrix feature for binary trademark images was proposed.First,according to the definition of curvature in Differential Geometry,every curvature of the fringe point was computed,and curvature-histogram was obtained as boundary feature.Second,the image was parted into several blocks,and then entropy for every block was counted.The entropy-matrix consisted of these entropy of every block.Last,images were retrieved by the two features.Experimental result shows that using the feature of boundary and region is better than using the single one,and it has better anti-geometric distortion effect.
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