The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2002
Filed:
Feb. 04, 1999
John R. Wootton, St. Louis, MO (US);
Gary S. Waldman, St. Louis, MO (US);
Gregory L. Hobson, St. Charles, MO (US);
Esco Electronics Corporation, St. Louis, MO (US);
Abstract
A method of authenticating a video image created by a camera (V) or similar video device. The image is formed into a first 2-dimensional pixel array (A ) with each pixel (p ) represented by a data word of a predetermined length. Additional data words including event information are added to this 2-dimensional array (A ). The formatted array is converted into a second 2-dimensional array (A ) which may be made smaller than the first array by eliminating rows and columns from the formatted array. A first linear vector (A ) is created using the data words in the second array, and a second linear vector (A ) is created by repositioning the data words from the first linear vector in a random pattern. A checksum is created by summing the contents of all of the data words in the second linear vector beginning at a location established by a pre-established formula. A header (H) is formed using the resulting checksum, information identifying the device used to create the image, and the time the image is formed. A cyclical redundancy check (CRC) is performed using all the data words in the formatted array (A ). Results of this operation are also included in the header. The header is attached to the formatted image and is transmitted and stored with the formatted image to subsequently authenticate the contents of the original image.