| Summary: | 碩士 === 國立交通大學 === 電資學院學程碩士班 === 89 === This thesis proposes simple method for color trademark retrieval. First, the edges of each color trademark are detected. Then, the center of the smallest circle that can cover all the edge pixels is derived by a geometry method. Based on the center and edges, four features of the color trademark are extracted, these include distance histogram, sampled contour, edge pixel density and hit statistic on a dartboard. Using these features, an efficient content-based color trademark retrieval system is constructed. In order to show the effectives of the proposed system, a comparison with those methods using Zernike moment magnitudes (ZMMs) is also made, and the experimental results show that the proposed system using hit statistic on dartboard is superior to ZMMs.
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