Method of embedding and extracting watermark data from original image adjusted with noise based image converted using watermark
AssigneesBeyontech, Inc, Haroo Company
InventorJoon-ho Sung
Life of this patent
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Abstract
Provided is a method of embedding and extracting watermark data that is robust against geometric distortion and low-quality photographing and for which the probability of successfully extracting watermark data for an original image is high, while the probability of successfully extracting the watermark data in the case of unauthorized copying is seriously impaired. The data embedding method according to an embodiment of the present invention comprises a step of converting the noise-based image using watermark data, and a step of adjusting the original image using the converted noise-based image.
Claims11
A method for embedding watermark data in an original image comprising the steps of:
- converting a noise-based image using watermark data, the step of converting comprising the steps of:
- configuring the noise-based image as a plurality of block units, each block unit having M×M pixels,
- unifying all of the pixels belonging to a block to either white or black for each of the plurality of blocks, and
- reflecting two-bit watermark data in each of the plurality of blocks while circulating the plurality of blocks;
- adjusting an original image using the converted noise-based image.
A method for embedding watermark data in an original image, the method comprising the steps of:
- providing a computing device having a computer program stored in a recording medium;
- converting a noise-based image using watermark data with the computer program on the computing device, and
- adjusting the original image using the converted noise-based image;
- wherein the step of converting the noise-based image using the watermark data comprises the steps of:
- configuring the noise-based image as a block unit having M×M pixels,
- unifying all of the pixels belonging to the block to either white or black for each of the blocks, and
- reflecting the two-bit watermark data to each of the blocks while circulating the blocks.
Dependencies are inferred from the claim text.