A watermark adjustment method and a watermark adjustment device are provided. The method includes determining whether a user clicks on a watermark preview interface in a predetermined manner; when it is determined that the user clicks on the watermark preview interface in the predetermined manner, generating a text box control according to a watermark pattern that is currently displayed to activate a watermark preview editing status; displaying the watermark pattern on the text box control; determining a text box display parameter according to a user setting for the text box control; and when the watermark preview editing status is ended, adjusting the watermark pattern according to the text box display parameter and displaying the adjusted watermark pattern in the watermark preview interface.

Watermark adjustment method and device

The present invention relates to a method and apparatus for controlling synchronization of camera shutters in an in-vehicle Ethernet communication network. A method for controlling synchronization of a camera shutter by a camera controller cooperating with a grandmaster through Ethernet communication may include performing a time synchronization procedure with the grandmaster, reducing a preset pulses per second (PPS) down counter if the time synchronization procedure is successfully completed, and operating the camera shutter when the PPS down counter reaches 0. Accordingly, the present invention may provide accurate image frames of a desired time through synchronization of shutters of cameras connected to an in-vehicle Ethernet network.

Method and apparatus for controlling sychronization of camera shutters in in-vehicle ethernet communication network

A digital medium environment includes an asset processing application that performs editing of a watermarked asset An improved asset editing method implemented by the asset processing application comprises receiving a watermarked asset, receiving edits to the watermarked asset, storing metadata corresponding to the edits together with an asset identification (ID), communicating the metadata and asset ID, applying edits using the metadata to an unwatermarked version of the asset retrieved using the asset ID, adding a watermark back to the edited asset, and providing the edited, watermarked asset

Editing watermarked assets

The invention relates to a high-embedding-capacity video steganography method and system based on time sequence residual convolution modeling. The method comprises the following steps: marking a reference frame and a residual frame of a secret video, simultaneously processing the reference frame and the residual frame by adopting a Y-shaped convolutional neural network to hide secret information and output a carrier video frame, and synthesizing the carrier video frame into a carrier video; and recovering secret information in the carrier video by adopting a Y-type convolutional neural network. Compared with a convolutional neural network-based image steganography algorithm which is directly applied to video steganography, the video steganography method has the advantages that the sparsityof a residual error between continuous frames is explored, two Y-type convolutional neural network structures are adopted, different endpoint processing is adopted for video frames with different properties, and part of convolutional layer parameters are shared at the same time. One video can be hidden in the other video with the same length, the hidden information amount can reach 24 bpp and ismuch larger than that of a traditional method, and the problem that the traditional method cannot be applied to high-embedding-capacity video steganography is solved to a great extent.

High-embedding-capacity video steganography method and system based on time sequence residual convolution modeling

The invention discloses a method for hiding and verifying built-in information suitable for a video. The method comprises the following steps: performing hash calculation on to-be-embedded hidden information by hashing to obtain a corresponding verification hash value; embedding the verification hash value into a P frame of the video; performing entropy decoding on the video to obtain a DCT coefficient block in an I frame; selecting an embedded block of the hidden information; determining a drift direction of the current embedded block, and selecting a corresponding coupling coefficient; embedding the hidden information and performing entropy encoding; extracting the embedded hidden information from the I frame in a target embedded video and performing hash calculation; and comparing withthe verification hash value in the P frame. Aiming at the situations that in the current video information hiding technology, the information hiding capacity is low, and the security and the robustness are limited, the technical scheme of the present invention provides a method for hiding built-in information of the video and verifying the data integrity, which solves the distortion drift caused by the information embedded in the frame of the video and protects the integrity of the hidden information to some extent.

Method for verifying built-in information hiding suitable for video

Watermark data is converted to watermark coefficients, which may be embedded in an image by converting the image to a frequency domain, embedding the watermark in image coefficients corresponding to medium-frequency components, and converting the modified coefficients to the spatial domain. The watermark data is extracted from the modified image by converting the modified image to a frequency domain, extracting the watermark coefficients from the image coefficients, and determining the watermark data from the watermark coefficients. The watermark data may be truncated image data bits such as truncated least significant data bits. After extraction from the watermark, the truncated image data bits may be combined with data bits representing the original image to increase the bit depth of the image. Watermark data may include audio data portions corresponding to a video frame, reference frames temporally proximate to a video frame, high-frequency content, sensor calibration information, or other image data.

Balineedu Chowdary Adsumilli

Papers

Inter frame watermark in a digital video