Method and system for determining image transformation

Details Method and system for determining image transformation Method and system for determining image transformation

2005-10-25

2005-10-25

Boudreau, Leo (Department: 2621)

Image analysis

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Reexamination Certificate

active

06959098

ABSTRACT:
A watermark decoding method makes use of a line-finding algorithm (e.g., the Radon transform) to determine rotation of an image from an initial orientation. Once rotation has been characterized, differential scaling of the image can readily be determined.

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O'Ruanaidh, “Rotation, Scale and Translation Invariant Digital Image Watermarking,” Int. Conf. On Image Proc., Oct. 1997, IEEE, pp. 536-539.

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