Fine-grained visual document fingerprinting for accurate...

Image analysis – Image segmentation – Segmenting individual characters or words

Reexamination Certificate

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C382S180000, C382S292000

Reexamination Certificate

active

08086039

ABSTRACT:
A method and system generates fine-grained fingerprints for identifying content in a rendered document. It includes applying image-based techniques to identify patterns in a document rendered by an electronic document rendering system, irrespective of a file format in which the rendered document was electronically created. The applying of the image-based technique includes identifying candidate keypoints at locations in a local image neighborhood of the document, and combining the locations of the candidate keypoints to form a fine-grained fingerprint identifying patterns representing content in the document.

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