蒋美容,张黎明,陈金萍,李恒,李玉龙

• 1:兰州交通大学测绘与地理信息学院
• 2:地理国情监测技术应用国家地方联合工程研究中心
• 3:甘肃省地理国情监测工程实验室
• 4:兰州交通大学电子与信息工程学院

摘要(Abstract)：

针对BIM数据版权保护的需求,该文运用数字水印技术,提出一种针对BIM模型版权保护的空间域数字水印算法。在BIM原始数据中对每个多面网格顶点坐标进行读取操作,获取坐标数据的高位部分;运用单向映射函数建立坐标值与水印位的对应关系;利用量化调制方法将水印嵌入坐标值中的较低有效位部分,保存得到含水印BIM模型数据;水印提取时,无须原始数据参与,是一种盲水印算法。在实际应用中,因BIM模型中顶点坐标的相同值较多,被用来嵌入水印的有效载体较少,为解决这一问题,在误差容许范围内对原始坐标数据加入了随机噪声,以嵌入不同的水印,间接地增加了水印嵌入容量。实验表明,该算法能够很好的控制水印嵌入引起的数据误差,数据使用完全不受影响,算法抗平移、修剪等攻击,且鲁棒性较好,对BIM模型的版权保护具有一定的实用性。

关键词(KeyWords)： BIM;数字水印;DXF;QIM;鲁棒性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41761080);; 兰州市人才创新创业科技计划资助项目(2016-RC-59);; 兰州交通大学优秀平台支持项目(201806)

作者(Author): 蒋美容,张黎明,陈金萍,李恒,李玉龙

DOI: 10.16251/j.cnki.1009-2307.2020.10.020

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