【摘要】 为了进一步扩展数字水印功能,提出了权限水印的概念,即水印信息定义用户对载体的具体操作。基于图像特征识别技术,构造基于语义特征的电子海图权限水印,通过对水印信息的解读,拦截和控制对电子海图的访问操作。实验分析表明,该方法能够实现网络环境下的数据分发和操作验证,在防篡改、水印伪造方面具有突出的性能。更多还原

【Abstract】 In order to expand the function of watermarking technology, a concept of authority watermark, for which, watermarks defining the users’ specific operations on the digital carriers was proposed. With interception technology on images, the constructed authority watermark based on the semantics characteristics of the watermark images, through the interpretation of the watermarks, accessing behaviors on the electronic chart would be controlled. Experimental results show that, this method can realize safety distribution and operation verification under the network environment, especially with outstanding performance in tamper resistant and forgery.更多还原