| 专利名称 | Identification system using computer generated moire | 申请号 | US27042288A | 专利类型 | US | 公开（公告）号 | US4921278A | 公开（授权）日 | 1990.05.01 | 申请（专利权）人 | 中国科学院 | 发明（设计）人 | SHIANG LU P ; HE DUANFENG | 主分类号 | B42D15/00 | IPC主分类号 | B42D15/00;G03H1/02;G06K7/10;G06K9/00 | 专利有效期 | Identification system using computer generated moire 至Identification system using computer generated moire | 法律状态 | 说明书摘要 | A computer generated moire identification system mainly uses two kinds of computer generated grids, one called object grids, and the other, reference grids. An object grid is used as an information carrier. The necessary specific information for identification such as the owner's signature or photograph is read into a computer, which codes the information into a grid, and then prints the code information onto an I/D plate or card. It is impossible to find out the hidden information by merely inspecting this plate. However, the coded information will reappear when the I/D plate is placed in a read-out machine, where the reference grid decodes the coded information in the form of Moire patterns. |
1、源头对接，价格透明
2、平台验证，实名审核
3、合同监控，代办手续
4、专员跟进，交易保障