In recent years, there has been a growing interest in the research of image content description techniques. Among those,
image clustering is one of the most frequently discussed topics. Similar to image recognition, image clustering is also a
high-level representation technique. However it focuses on the coarse categorization rather than the accurate recognition.
Based on wavelet transform (WT) and advanced statistics, the authors propose a novel approach that divides various
shaped logo images into groups according to the external boundary of each logo image. Experimental results show that
the presented method is accurate, fast and insensitive to defects.
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