In this paper, a new oriented pattern spectrum is presented, and its properties are discussed. It can represent well the information of shape in certain direction, which is different from that proposed by Petros Maragos, and can be properly used in shape analysis. A practical method of extracting the oriented pattern spectrum in noisy binary image is developed, and an efficient distance function is presented to recognize different shapes with their new oriented pattern spectrums. As a practical application, the oriented pattern spectrums are used to recognize warning traffic signs on roads.
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