Method for extracting multiresolution watermark images to determine rightful ownership

Claim 1

A method for embedding and extracting visually imperceptible indicia in an image, comprising; embedding a visually imperceptible indicia in an original image; generating a pseudo random sequence, including using a one-way deterministic function, to a single parameter and using the single parameter as a seed to generate an independent identical distribution pseudo random sequence; testing a test image for an embedded visually imperceptible indicia; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image, wherein said embedding and said extracting include dividing an image into segments, and wherein said extracting includes making use of neighboring watermark bits to detect the current bit, for an image that has been subject to different levels of signal processing; and wherein said extracting further includes adaptively selecting a number of segments for watermark detection as a function of the level of signal processing.

Claim 2

A method for embedding and extracting visually imperceptible indicia in an image, comprising; embedding a visually imperceptible indicia in an original image; generating a pseudo random sequence, including using a one-way deterministic function, to a single parameter and using the single parameter as a seed to generate an independent identical distribution pseudo random sequence; testing a test image for an embedded visually imperceptible indicia; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image, wherein said embedding and said extracting include dividing an image into segments, and wherein said extracting includes making use of neighboring watermark bits to detect the current bit, for an image that has been subject to different levels of signal processing; and wherein said extracting further includes adaptively selecting a number of segments for watermark detection as a function of the level of signal processing.

Claim 12

A method for embedding and extracting visually imperceptible indicia in an image, comprising: embedding a visually imperceptible indicia in an original image, including designating a logo image to be embedded in an original image, wherein said designating includes designating multiple one-bit indicia; selecting a signature S 0 ; generating a pseudo random sequence S 1 from the signature S 0 , including mapping S 0 , using a one-way deterministic function H, to a single parameter and using the single parameter as a seed to generate an independent identical distribution pseudo random sequence; modulating the logo image by the pseudo random sequence to develop a visually imperceptible indicia; and inserting the visually imperceptible indicia into the original image; testing a test image for an embedded visually imperceptible indica; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image including placing a one-bit visually imperceptible indicia into each segment; wherein said embedding and said extracting include dividing an image into segments and wherein said extracting includes making use of different number of segments associated with neighboring visually imperceptible indicia-bearing bits to detect the current bit, for an image that has been subject to different levels of signal processing, and wherein said extracting further includes adaptively selecting a number of segments for watermark detection as a function of the level of signal processing and of the need for robust detection and degree of resolution.

Claim 13

A method for embedding and extracting visually imperceptible indicia in an image, comprising: embedding a visually imperceptible indicia in an original image, including designating a logo image to be embedded in an original image, wherein said designating includes designating multiple one-bit indicia; selecting a signature S 0 ; generating a pseudo random sequence S 1 from the signature S 0 , including mapping S 0 , using a one-way deterministic function H, to a single parameter and using the single parameter as a seed to generate an independent identical distribution pseudo random sequence; modulating the logo image by the pseudo random sequence to develop a visually imperceptible indicia; and inserting the visually imperceptible indicia into the original image; testing a test image for an embedded visually imperceptible indica; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image including placing a one-bit visually imperceptible indicia into each segment; wherein said embedding and said extracting include dividing an image into segments and wherein said extracting includes making use of different number of segments associated with neighboring visually imperceptible indicia-bearing bits to detect the current bit, for an image that has been subject to different levels of signal processing, and wherein said extracting further includes adaptively selecting a number of segments for watermark detection as a function of the level of signal processing and of the need for robust detection and degree of resolution.

Claim 19

A method for embedding and extracting visually imperceptible indicia in an image, comprising: embedding a visually imperceptible indicia in an original image; testing a test image for an embedded visually imperceptible indica, wherein said testing includes transforming a test image X into an image feature set X i ; developing a random sequence S 1i by subjecting a key S 0 to a one-way deterministic function H; generating a correlating signature S 2i from S 1i and a perceptual model; and comparing the correlating output to a threshold value to determine the presence of a watermark; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image; wherein said embedding and said extracting include dividing an image into segments, and wherein said extracting includes making use of neighboring watermark bits to detect the current bit, for an image that has been subject to different levels of signal processing; and wherein said extracting further includes adaptively selecting a number of segments for watermark detection as a function of the level of signal processing and of the need for robust detection and degree of resolution, wherein a large number of segments are used to increase robustness and a smaller number of segments are used to increase resolution.

Claim 20

A method for embedding and extracting visually imperceptible indicia in an image, comprising: embedding a visually imperceptible indicia in an original image; testing a test image for an embedded visually imperceptible indica, wherein said testing includes transforming a test image X into an image feature set X i ; developing a random sequence S 1i by subjecting a key S 0 to a one-way deterministic function H; generating a correlating signature S 2i from S 1i and a perceptual model; and comparing the correlating output to a threshold value to determine the presence of a watermark; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image; wherein said embedding and said extracting include dividing an image into segments, and wherein said extracting includes making use of neighboring watermark bits to detect the current bit, for an image that has been subject to different levels of signal processing; and wherein said extracting further includes adaptively selecting a number of segments for watermark detection as a function of the level of signal processing and of the need for robust detection and degree of resolution, wherein a large number of segments are used to increase robustness and a smaller number of segments are used to increase resolution.