| 一种地图水印的嵌入方法 |
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| 引用本文： | 王小虎,邵楷,吴爱华. 一种地图水印的嵌入方法[J]. 长春大学学报, 2010, 0(2): 45-47 |
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| 作者姓名： | 王小虎 邵楷 吴爱华 |
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| 作者单位： | [1]长春工业大学计算机科学与工程学院,吉林长春130012 [2]沈阳军区联勤部疾病预防控制中心,沈阳110034 [3]铁东区市容环境卫生监察大队,吉林四平136001 |
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| 摘 要： | 地图水印是地图版权保护的有效方法，以往的地图水印算法都不能得到很好的抗剪切性。本文分析了已有的地图水印算法，提出了采用字移和行移文档的水印技术思想，在同种颜色的区域内，通过改变边缘上相邻两个点的距离信息来达到嵌入水印的目的，并通过实验证明此算法是有效的。
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| 关 键 词： | 水印 字移 行移 嵌入 |
A research on the implementing method of gray level histogram specification based on Matlab |
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| Affiliation: | XING Xiao-xue, JI Shu-jiao (College of Electronic Information Engineering, Changchun University, Changchun 130022, China) |
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| Abstract: | Histogram specification can change the histogram of images into a specific form, which can enhance the image of any gray intervals so as to provide users with interesting information. This paper introduces two classical implementing methods of histogram specifi- cation, the basic principle of single mapping law（SML） and group mapping law（GML）. By comparative analysis on the specification processing of image samples, it proves the superiority of GML to SML. The simulation resuhs show that the given GML algorithm can solve the problem of incomplete approximation of the gray levels between the specified histogram and the histogram of the final image. |
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| Keywords: | Matlab histogram specification single mapping law group mapping law |
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