Yun-qiong Wang

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The traffic sign detection problem is investigated in this paper. A segmentation method for traffic sign image in HSV color space is presented for the detection of prohibition sign, warning sign and mandatory sign. First, the image is pre-segmented by H and S components with threshold value in HSV space. Second, the regions that their area and the ratio of(More)
In this paper we construct a new class of nonlinear chaotic maps for secure cryptosystems. These maps can overcome the security holes brought by the “piecewise linearity” of the previous Piecewise Linear Chaotic Maps (PWLCM) due to a fact that the chaotic sequences generated by the derived iterative system based on the proposed maps are proved(More)
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