In an example, a capture system includes a content capture mechanism, an isolation engine, a mark strength engine, and a parameter controller. In that example, the isolation engine generates mark data, the mark strength engine identifies a first variance level in a first region of a first set of mark data, and the parameter controller adjusts a parameter of the content capture mechanism in accordance with a strength change based on a comparison of the first variance level to a second variance level in a first region of a second set of mark data.

In one embodiment, a method for 3D digital watermarking for a triangular mesh using one or more key parameters is disclosed including forming a Hamiltonian path of a desired length around a selected vertex in a selected direction of a spiral; marking the selected vertex a dead end if there is a deadlock and continuing the spiral; and applying a watermark by introducing points in a path order on edges of the spiral, wherein information is encoded at a partition of adjacent triangles at one or more of the points.

A first digital image is integrated into a second digital image to generate a third digital image. A first code representing the procedures performed to integrate the first digital image into the second digital image is generated. A second code representing information for retrieving the first digital image is generated. The first code and the second code are embedded as metadata into a file that contains the second digital image.

In an example method, a dot pattern of pixels including information to be encoded across an image is mapped to a corresponding subset of the grayscale source pixels corresponding to the image to be printed. A value of a grayscale pixel in the subset of the grayscale source pixels is modified based on based on a predetermined threshold pixel value. The value of the grayscale pixel is decreased in response to detecting that the predetermined threshold pixel value is exceeded. The clipping channel color is used to detect the dot pattern of pixels. The image including the subset of pixels with modified values is printed.

The present invention relates generally to digital watermarking. One aspect of the disclosure includes a method comprising: obtaining data representing imagery; using one or more configured processors, analyzing a plurality of portions of the data to detect a redundantly embedded watermark signal, the analyzing producing detection statistics for each of the plurality of portions, the detection statistics comprising a payload signature, a rotation angle and a scale factor for each portion of the plurality of portions; accumulating payload signatures based on compatible rotation angles and scale factors, said accumulating yielding an accumulated payload signature; and decoding a plural-bit payload from the accumulated payload signature. Of course, many other aspects and disclosure are provided in this patent document.

The invention relates to systems and methods of securely transmitting an image stored in the memory of an identity document to a first terminal that is suitable for receiving the image. In various implementations, operations are performed by the identity document, including the identity document receiving an attribute transmitted by the first terminal; generating a marker from the attribute received from the terminal; including the marker in the image; and transmitting the image containing the marker, which may be referred to as the modified image, to the terminal.

A method for providing watermark to subscribers is provided. The method comprises observing a request for a first content from a subscriber, determining if the subscriber can receive a watermark, generating a second content comprising the watermark if the subscriber can receive a watermark, causing the subscriber to fetch the first content, and causing the subscriber to fetch the second content comprising the watermark overlaying the first content.

This disclosure relates to advanced image signal processing technology including encoded signals and digital watermarking. One implementation is directed a printed object comprising: a substrate comprising a first area; a first colored ink or design printed within the first area, the first colored ink or design comprising a spectral reflectivity of less than or equal to 20% at or around 660 nm; a colored ink mixture printed over the first colored ink or design at a first plurality of spatial locations within the first area, the colored ink mixture printed such that the first area comprises a second plurality of spatial locations without the colored ink mixture, the colored ink mixture comprising opaque white ink and a first colorant, wherein the color ink mixture comprises a spectral reflectivity greater than the first colored ink or design at or around 660 nm, and wherein colored ink mixture comprises a spectral reflectivity less than the first colored ink or design in the range of 495 nm-570 nm; in which the first plurality of spatial locations is arranged in a pattern conveying an encoded signal, and in which the first colored ink or design and the colored ink mixture comprise a spectral reflectivity difference at or around 660 nm in a difference range of 8%-30%. Of course, other objects, methods, packages, labels, containers, systems and apparatus are described in this patent document.

In one or more embodiments, one or more systems, methods, and/or processes may redirect a request to open a document to a background process that controls access to the document; may determine policy information associated with the document and a user of an application; may provide the document to the application; may determine an area of a user interface of the application that displays information of the document; may determine watermark information based at least on the policy information; may generate one or more watermarks based at least on the watermark information; and may display the one or more watermarks, based at least on the watermark information, on the area of the user interface of the application that displays the information of the document.

The device (10) for recording a document (130, 135) exhibiting a marking (132) produced by a stamp comprising at least one relief for successive contacting with a pigment and a surface of a document to be marked, one form of at least one said relief being representative of: a separator identifying a first page of the document, a user identifier; and/or an alphanumeric item of information parameterized by a user,
comprises: an image sensor (105) for digitizing the document into at least one image, a detector (110) of the marking on at least one digitized image, a means (115) for reading the information, the marking, representative of: the user identifier; and the alphanumeric item of information; and a means (120) for recording the digitized document as a function of the information read.