Osama M Alattar

6975744, Dec 13, 2005

Dec 20, 2001

10/032282

Ravi K. Sharma - Hillsboro OR, US
Osama M. Alattar - Tigard OR, US

Digimarc Corporation - Beaverton OR

H04K001/00

382100

Steganographic calibration signals (sometimes termed “orientation signals,” “marker signals,” reference signals,” “grid signals,” etc. ) are sometimes included with digital watermarking signals so that subsequent distortion of the object thereby marked (e. g. , a digital image file, audio clip, document, etc. ) can later be discerned and compensated-for. Digital watermark detection systems sometimes fail if the object encompasses several separately-watermarked components (e. g. , a scanned magazine page with several different images, or photocopy data resulting from scanning while several documents are on the photocopier platen). Each component may include its own calibration signal, confusing the detection system. In accordance with certain embodiments, this problem is addressed by a proximity-based approach, and/or a multiple grid-based approach. In accordance with other embodiments, the calibration signal can—itself—convey watermark information, so it serves both a calibration and a payload-conveyance function.

6993149, Jan 31, 2006

Sep 25, 2001

09/963344

Hugh L. Brunk - Portland OR, US
Osama M. Alattar - Tigard OR, US

Digimarc Corporation - Beaverton OR

G06K 9/00

382100, 382162

The present invention relates to digitally watermarking spot color images. In one embodiment, an original spot color is replaced with a combination of cyan (C), magenta (M) and yellow (Y) components and the original spot color. The CMY components convey a digital watermark. Preferably, a large percentage halftone process screens the spot color. This screened spot color is combined with the CMY components. Combining the CMY components with a large percentage halftone screening results in a watermarked image color that closely approximates to the original spot color. In another embodiment, a spot color is halftone-screened to a percentage of its original intensity. The screened-back spot color is modulated to accommodate a watermark signal.

8014557, Sep 6, 2011

Jun 17, 2004

10/871349

Adnan M. Alattar - Tigard OR, US
Osama M. Alattar - Tigard OR, US

Digimarc Corporation - Beaverton OR

G06K 9/00

382100

A text watermarking method embeds an auxiliary message in an original electronic text document to form a watermarked text document. The method applies a spreading function to message symbols to spread the symbols over a carrier, which forms a modulated carrier. It maps elements of the modulated carrier to corresponding inter-word spaces in the electronic text document, and applies an embedding function to modify the corresponding inter-word spaces according to elements of the modulated carrier signal such that the modified inter-word spaces hide the modulated carrier signal in the watermarked text document. The message symbols are automatically decodable from the watermarked document without the original electronic text document. A compatible decoder extracts the auxiliary message from a printed or electronic watermarked text document. The decoder automatically measures inter-word spaces in the watermarked text document.

8144368, Mar 27, 2012

Nov 26, 2003

10/723181

Tony F. Rodriguez - Portland OR, US
Alastair M. Reed - Lake Oswego OR, US
Ravi K. Sharma - Portland OR, US
Osama M. Alattar - Tigard OR, US
Brett T. Hannigan - Portland OR, US
Kenneth L. Levy - Stevenson WA, US
Hugh L. Brunk - Portland OR, US
Geoffrey B. Rhoads - West Linn OR, US
Ammon E. Gustafson - Beaverton OR, US

Digimarc Coporation - Beaverton OH

H04N 1/40
G06K 9/00

358 328, 358 19, 358 21, 358 31, 358 14, 358 18, 358 301, 358 302, 358 329, 358 33, 358 331, 358 332, 358 112, 358 114, 358 115, 358 116, 358 118, 358501, 358505, 358515, 358529, 358535, 382100, 382135, 382195, 382232, 382284, 382250, 382171, 382175, 380 22, 380 43, 380 51, 380 54, 380201, 380203, 380223, 380226, 380228, 380232, 380250, 380258, 380278

This disclosure describes methods for using embedded auxiliary signals in documents for copy detection and other applications. In on application, the auxiliary signal is formed as an array of elements selected from a set of print structures with properties that change differently in response to copy operations. These changes in properties of the print structures that carry the embedded auxiliary signal are automatically detectable. For example, the changes make the embedded auxiliary signal more or less detectable. The extent to which the auxiliary data is detected forms a detection metric used in combination with one or more other metrics to differentiate copies from originals. Examples of sets of properties of the print structures that change differently in response to copy operations include sets of colors (including different types of inks), sets of screens or dot structures that have varying dot gain, sets of structures with different aliasing effects, etc. Robust and fragile watermarks are used in Image Replacement Documents for a variety of applications. Digital watermarks act as on-board mediators in authentication of a variety of printed documents.

8320611, Nov 27, 2012

Jul 12, 2011

13/181072

Adnan M. Alattar - Tigard OR, US
Osama M. Alattar - Tigard OR, US

Digimarc Corporation - Beaverton OR

G06K 9/00

382100

A text watermarking method embeds an auxiliary message in an original electronic text document to form a watermarked text document. The method applies a spreading function to message symbols to spread the symbols over a carrier, which forms a modulated carrier. It maps elements of the modulated carrier to corresponding inter-word spaces in the electronic text document, and applies an embedding function to modify the corresponding inter-word spaces according to elements of the modulated carrier signal such that the modified inter-word spaces hide the modulated carrier signal in the watermarked text document. The message symbols are automatically decodable from the watermarked document without the original electronic text document. A compatible decoder extracts the auxiliary message from a printed or electronic watermarked text document. The decoder automatically measures inter-word spaces in the watermarked text document.

20020126873, Sep 12, 2002

Feb 11, 2002

10/074677

Osama Alattar - Tigard OR, US
Alastair Reed - Lake Oswego OR, US
Trent Brundage - Tigard OR, US

G06K009/00

382/100000

The present invention relates to digitally watermarking spot colors. Spot colors are represented as digital files including a set of intensity values. These intensity values correspond to the amount or percentage of spot color ink that should be applied to a pixel, a group of pixel or to an image area. A watermark signal component including luminance value adjustments is converted to intensity value adjustments. These intensity value adjustments are applied to the spot color digital file to facilitated digital watermark embedding. In another embodiment, an adjustment is made to the intensity values to compensate for noise introduced by a scanner, camera or color conversion.

20060062428, Mar 23, 2006

Sep 14, 2005

11/228033

Osama Alattar - Tigard OR, US
Adnan Alattar - Tigard OR, US

G06K 9/00

382100000

The present invention relates generally to digital watermarking. In one implementation, we provide a hierarchical digital watermark detector method. The method includes: i) in a first layer of a hierarchical search, performing watermark detection on blocks of at least a portion of an incoming suspect signal; ii) identifying a first block in the portion that is likely to include a decodable digital watermark; and iii) in a second layer of the hierarchical search, performing additional watermark detection on overlapping blocks in a neighborhood around the first block. Another implementation provides a hierarchical watermark detector including a buffer and a detector. The buffer stores portions of an incoming signal. The detector evaluates watermark detection criteria for blocks stored in the buffer, and hierarchically zooms into a neighborhood of blocks around a block associated with watermark detection criteria that satisfies detection criteria.

20220331841, Oct 20, 2022

Apr 15, 2022

17/721694

- Beaverton OR, US
Vojtech Holub - Lafayette CO, US
Ravi K. Sharma - Portland OR, US
Tony F. Rodriguez - Portland OR, US
Osama M. Alattar - Tigard OR, US
Adnan M. Alattar - Tigard OR, US
Hugh L. Brunk - Portland OR, US
Brett A. Bradley - Portland OR, US
Ajith M. Kamath - Beaverton OR, US

B07C 5/342
B65G 47/26
G06K 9/62

A waste stream is analyzed and sorted to segregate different items for recycling. Certain features of the technology improve the accuracy with which waste stream items are diverted to collection repositories. Other features concern adaptation of neural networks in accordance with context information sensed from the waste. Still other features serve to automate and simplify maintenance of machine vision systems used in waste sorting. Yet other aspects of the technology concern marking 2D machine readable code data on items having complex surfaces (e.g., food containers with integral ribbing for structural strength or juice pooling), to mitigate issues that such surfaces can introduce in code reading. Still other aspects of the technology concern prioritizing certain blocks of conveyor belt imagery for analysis. Yet other aspects of the technology concern joint use of near infrared spectroscopy, artificial intelligence, digital watermarking, and/or other techniques, for waste sorting. A variety of further features and arrangements are also detailed.