Ensuring image integrity using document characteristics

Details Ensuring image integrity using document characteristics Ensuring image integrity using document characteristics

G - Physics

06

T

G06T 7/00 (2006.01) G06F 11/00 (2006.01) G06T 1/00 (2006.01)

Patent

CA 2641301

Image integrity in an archive can be verified using document characteristics. Embodiments of the invention provide a way to verify the integrity of a stored document image by determining document characteristics, which can also be embedded in the image file. Before allowing access to the image file by an application, the characteristics data from an image analysis can be compared to either or both of, characteristics information otherwise stored, or embedded characteristics data. The embedded data can optionally be encrypted. In example embodiments the data can include a result of an optical character recognition of contents of the document, a length of data describing the image, a percentage of a specified color of pixels in the image, or a checksum. Example embedding techniques can include those making use of a tagged image file format (TIFF) header, a steganographic watermark, or an image artifact.

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