Coded document and document reading system
First Claim
1. A coded document reader for reading a coded document of the type having a plurality of markable areas defined thereon and a first and second coded pattern disposed thereon in predetermined relation to the markable areas, said coded document reader comprising:
- means for storing a first and second pattern signature corresponding to said coded patterns;
means for capturing and storing an image carried on said carried document;
means for detecting stored image signatures corresponding to said stored first and second pattern signatures; and
means for identifying stored image data of said markable areas responsive to said detected signatures.
10 Assignments
0 Petitions
Accused Products
Abstract
A coded document is provided for use in a document reading system having a plurality of markable areas defined thereon and a first and second coded pattern disposed in predetermined relation to the markable areas. Each of the coded patterns has an identical predefined signature when viewed from any direction. A coded document reader includes a video camera that captures the image carried on the coded document. Pixel data is stored in a memory corresponding to the document area scanned by the video camera. The stored data is analyzed to identify detected signatures corresponding to the coded pattern signatures. Based on the location of the identified detected signatures and stored data defining the positions of the markable locations relative to the coded patterns, the position within the stored data of each of the markable locations on the card is determined.
-
Citations
12 Claims
-
1. A coded document reader for reading a coded document of the type having a plurality of markable areas defined thereon and a first and second coded pattern disposed thereon in predetermined relation to the markable areas, said coded document reader comprising:
-
means for storing a first and second pattern signature corresponding to said coded patterns; means for capturing and storing an image carried on said carried document; means for detecting stored image signatures corresponding to said stored first and second pattern signatures; and means for identifying stored image data of said markable areas responsive to said detected signatures. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A coded document reader for reading a coded document of the type having a plurality of markable areas defined thereon and a first and second coded pattern disposed thereon in predetermined relation to the markable areas, said coded document reader comprising:
-
means for storing a first and second pattern signature corresponding to said coded patterns; means for storing relative position data defining a predetermined relation of said stored first and second signatures and said markable areas; means for capturing and storing an image carried on said coded document; means for detecting stored image signatures corresponding to said stored first and second pattern signatures; and means responsive to both said detected signatures and said stored relative position data for identifying said stored image data corresponding to said markable areas. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification