Provided is a method and apparatus for digital image watermarking. In the method and apparatus, a computer system receives a first image and receive information for embedding in the first image. The computer system preprocesses the first image to produce a preprocessed first image and preprocesses the information by at least channel-encoding the information to produce preprocessed information including a plurality of sets of bits. The computer system embeds the preprocessed information in the preprocessed first image by at least selecting a plurality of blocks of the preprocessed first image and embedding in each block of the plurality of blocks a respective set of bits of the plurality of sets of bits. Each set of bits of the plurality of sets of bits is embedded in a minimum number of blocks of the plurality of blocks, where the minimum number of blocks is greater than one.

One aspect of the present invention discloses an apparatus for detecting additional data for preventing forgery of video data and displaying the video content. The apparatus includes a content input unit configured to receive the video content (the video content including the additional data), a display unit configured to display the video content, an additional data detector configured to detect the additional data from the video content (the additional data including a watermark), and a display controller configured to control a display screen of the video content according to an additional data detection result.

Even when an image in which a watermark is embedded is processed, certainty of detecting the watermark is increased. Image data acquisition unit of an image processing device acquires image data. A watermark generation unit generates watermarks having a plurality of sizes. An image processing unit embeds the respective watermarks having the plurality of sizes generated by the watermark generation unit in an image indicated by the image data acquired by the image data acquisition unit.

One aspect of the present invention discloses a watermark insertion method. The method includes: segmenting target text into pieces of page content; obtaining a watermark variable comprising a line alternation value indicative of a watermark mode changed for each line of the segmented page content and a watermark mode setting value; and applying a flip-flop component insertion algorithm for inserting a watermark into each of the pieces of segmented page content based on the obtained watermark variable.

Method and apparatus are disclosed for publishing locational copyrighted watermarking video. According to some embodiments, a method for embedding location information into a video comprises: separating the video into at least one key frame and at least one in-between frame set corresponding to the at least one key frame; receiving location data for the at least one key frame; encrypting the location data for the at least one key frame based on a location private key; and embedding the encrypted location data into the at least one key frame.

Disclosed is a display apparatus in which each pixel corresponds to at least one light-emitting element. The display apparatus includes a display including a plurality of pixels, a driver configured to drive a plurality of light-emitting elements constituting the plurality of pixels, and a processor configured to control the driver to drive the plurality of light-emitting elements based on a first pulse width modulation signal having a duty corresponding to a grayscale of an input image, and to control the driver to drive light-emitting elements constituting a specific pixel, among the plurality of pixels, using a second PWM signal having a duty corresponding to the grayscale of the input image, wherein a frequency of the first PWM signal is different from a frequency of the second PWM signal.

One aspect of the present invention discloses a client device for content security. The device includes: an application execution unit configured to control content in response to a content control command requested in a user level; a DRM agent configured to communicate with a DRM server and the application execution unit in the user level, to detect the content control command, to receive an encryption/decryption key and security policy for content from the DRM server, to provide the received encryption/decryption key and security policy to a client kernel module, and to transmit an encryption/decryption request; and the client kernel module configured to receive the encryption/decryption key and the security policy, to store the encryption/decryption key and security policy in a secure box of a kernel level, and to perform encryption or decryption on the content based on the encryption/decryption key and security policy in response to the encryption/decryption request.

A wireless communication device comprises position determining system, a digital imaging system and a photograph customization system coupled to the position locating system and the digital imaging system. The position determining system is configured to provide information indicating a current position of the wireless communication device. The digital imaging system is configured to create digitally rendered images of visual content acquired thereby. The visual content is displayed on an image viewing structure of the digital imaging device while being acquired. The photograph customization system is configured to use the current location of the digital imaging device for providing one or more embeddable content ages and to display information from at least one of the one or more embeddable content images on an image viewing structure of the digital imaging device while the visual content being acquired by the digital imaging system is being displayed on the image viewing structure.

The method (100) for securing an object comprises: a step of encoding a first message (301) in a two-dimensional barcode (303), the first message comprising at least a header identifying a certification resource and a signature produced by means of this resource; a step of generating a fragile anti-copy mark (304) encoding a second message (302) representative of the signature produced, the second message comprising redundancies; and a step of marking the object with the first 2D barcode and the fragile anti-copy mark.

A first instance of a digital watermark may be embedded into an image. The first instance may encode information. A second instance of the digital watermark may be embedded into the image. The second instance may encode the information of the first instance. The second instance may be a sized differently or may be larger than the first instance.