SGER: Photo Polymer Based Optical Pattern Recognition for Security Verification

9523759 Javidi信用卡欺诈是许多银行、企业和消费者面临的严重问题。 此外，假冒产品，如计算机芯片、光盘和名牌时装，正大量抵达我们的海岸。 随着计算机、CCD技术、图像处理硬件和软件、打印机、扫描仪和复印机的快速发展，复制图片、标识、符号、纸币或图案变得越来越容易。 信用卡和护照目前使用全息图作为防止复制的安全措施。 但是技术已经发展到可以很容易地从信用卡上获得全息图像的地步--以及使用商业上可用的光学元件或全息图制作设备合成的新全息图。 我们提出了一个新的系统，用于信用卡，护照和其他ID的安全验证，使他们不能轻易地被复制。 该系统采用了一种新的复杂的相位/振幅模式，不能看到，也不能复制的强度敏感的检测器，如CCD相机。 其基本思想是将随机相位掩模永久且不可恢复地结合到主要识别图案，例如指纹，面部照片或签名。 为了额外的安全性，主图案也可以是相位编码的，这导致非常安全的系统。 随机相位掩模和主图案两者在光学系统中都是可识别的。 ***

9523759 Javidi Credit card fraud is a serious problem facing many banks, businesses, and consumers. In addition, counterfeit products such as computer chips, compact discs, and designer fashions, are arriving on our shores in great numbers. With the rapid advances in computers, CCD technology, image processing hardware and software, printers, scanners, and copiers, it is becoming increasingly easy to reproduce pictures, logos, symbols, paper currency, or patterns. Credit cards and passports currently use holograms as a security measure to thwart copying. But technology has advanced to the point where the holographic image can be easily acquired from a credit card - and a new hologram synthesized using commercially available optical components or hologram-producing equipment. We propose a novel system for security verification of credit cards, passports, and other IDs so that they cannot easily be reproduced. The system uses a new scheme of complex phase/amplitude patterns that cannot be seen and cannot be copied by an intensity-sensitive detector such as a CCD camera. The basic idea is to permanently and irretrievably bond a random phase mask to a primary identification pattern such as a fingerprint, a picture of a face, or a signature. For additional security, the primary pattern could also be phase encoded which results in a very secure system. Both the random phase mask and the primary pattern are identifiable in an optical system. ***