Patent ID: 11928847
Assignee: ELM COMPANY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. The method according to claim 16, further comprises:
capturing, sequentially at a third set of placement angles that are different from each other, a third set of photo images of a security feature of a second unknown document that is placed under the illumination condition, wherein the second unknown document is of the document genre and whose authenticity is to be determined, and wherein the third set of placement angles are mechanically secured, by an automated angle adjustment means, to be equal to the values of the first set of estimated angles;
storing the third set of placement angles along with and in association with the third set of photo images; and
determining the authenticity of the second unknown document by applying the learned model on the third set of photo images and the third set of placement angles, wherein the applying the model at least involves comparing a piece of descriptive information about the security feature of the second unknown document that is encoded in the learned model as a part of the document's angular responses of the document genre under the illumination condition, with a piece of information about the security feature of the second unknown document extracted from the third set of the photo images and the third set of placement angles, wherein the comparing step produces a second confidence value, and if the second confidence value is below the pre-determined confidence threshold, the second unknown document is determined to be unauthentic, otherwise the second unknown document is determined to be authentic with regard to the security feature of the second unknown document.