海明校验 meaning in English
hamming check
Examples
- This method obtains structure types and strokes of chinese characters through chinese characters mathematic expression , and then the whole document is divided into two blocks by utilizing structure types of chinese characters . in each block , the position selected to embed is chose by chinese character ’ s strokes and the watermarking bit . watermarking bits with a robust structure is generated by chaos encrypting and hamming checkout coding ; embedding is implemented through setting underline to font
该方法通过汉字数学表达式,获取汉字的结构类型和笔画数,利用汉字的结构类型将整个文档分成两块,在各块中由汉字笔画数和水印比特位共同确定水印加载的位置,通过混沌加密和海明校验编码将水印生成一种具有鲁棒性的水印结构,然后通过设置字体下划线将水印按对称性的嵌入策略分别嵌入文本的两块中。 - When the watermarking bit is destroyed , which position can be judged exactly , and then block checkout and hamming checkout are used to recover it . meanwhile , watermarking can be extracted without the original document and original watermarking information , which is significative copyright information , so it is a public watermarking technology
抗攻击时,能准确判断水印比特位受破坏的具体位置,并能通过块校验和海明校验将破坏的水印比特位进行适当恢复;同时,提取水印时既不需要原始文本,也不需要原始水印,且提取的水印信息是有意义的版权信息,是一种公开水印。