首页>
外国专利>
DOCUMENT AUTHENTICATION BY ATTITUDE-INDEPENDENT DETERMINATION OF SURFACE APPEARANCE USING CONTROLLED ILLUMINATION
DOCUMENT AUTHENTICATION BY ATTITUDE-INDEPENDENT DETERMINATION OF SURFACE APPEARANCE USING CONTROLLED ILLUMINATION
展开▼
机译:使用受控照明通过姿态独立确定表面外观进行文件认证
展开▼
页面导航
摘要
著录项
相似文献
摘要
A user is guided to move a device equipped with an illuminator and a camera with respect to a document whose genuineness is to be assessed. The motion includes changing the distance between the device and the document by moving the device or moving the document. Imagery of the document is captured during the movement and analyzed to determine a likelihood that the document includes features indicative of genuineness, such as a hologram, an original photograph, and other regions matching those of a genuine document. The analysis may include identifying regions exhibiting large changes in appearance over relatively small distance changes which characterize holograms, and obtaining the spatial extent of document features.
展开▼