Performance Analysis of Digital Video Watermarking using Discrete Cosine Transform [PDF]
, 2011 In this paper, we have suggested the transform domain method for digital video watermarking for embedding invisible watermarks behind the video. It is used for copyright protection as well as proof of ownership.
Dwivedi, Ved V., Kothari, Ashish M.
core
Advanced Science, EarlyView.Geometric constraint reconfiguration enables a rigid–foldable kirigami‐inspired mechanism to switch between twisting, directional translation, and self‐locking states. By encoding multifunctionality directly into its architecture, the mechanism achieves multimodal motion and passive locking without reassembly, providing a compact platform for adaptive ...
Jianlin Wang, Zhongmin Song, Ketao Zhang
wiley +1 more source
Compressed Wideband Spectrum Sensing Based on Discrete Cosine Transform [PDF]
, 2020 Discrete cosine transform (DCT) is a special type of transform which is widely used for compression of speech and image. However, its use for spectrum sensing has not yet received widespread attention.
Yulin Wang, Gengxin Zhang
core
Stochastic Entanglement of Deterministic Origami Tentacles For Robust Robotic Grasping
Advanced Science, EarlyView.This study introduces an origami tentacle gripper to robustly grasp objects‐in air, underwater, and even in orbital space‐by exploiting a synergy between local, deterministic deformation programming and global, stochastic entanglements. A single origami tentacle can be designed to coil with a simple tendon pull.
Alec Boron +4 more
wiley +1 more source
Suppression of Continuous Wave Interference in Loran-C Signal Based on Sparse Optimization Using Tunable Q-Factor Wavelet Transform and Discrete Cosine Transform. [PDF]
Sensors (Basel), 2021 Ma W, Gao J, Yuan Y, Shi Z, Xi X.
europepmc +1 more source
Fast computation of two-dimensional discrete cosine transforms using fast discrete radon transform
, 1991 A new fast algorithm is presented for computing the two-dimensional discrete cosine transform (2D DCT) using the fast discrete Radon transform. The algorithm has the lowest number of multiplications compared with other algorithms.
Crebbin, G., Ta, N., Attikiouzel, Y.
core
Computation of Hilbert Transform via Discrete Cosine Transform
, 2010 Hilbert transform (HT) is an important tool in constructing analytic signals for various purposes, such as envelope and instantaneous frequency analysis, amplitude modulation, shift invariant wavelet analysis and Hilbert-Huang decompo-sition.
Hannu Olkkonen +5 more
core +1 more source
Bistable Networks Enable Complex Shape Changes
Advanced Science, EarlyView.Transition‐controlled metamaterials are networks of bistable mechanical memory that store local binary states and express them as global shape change. By decoupling low‐force programming from high‐force holding, a single lattice is reconfigured into distinct 2D profiles and 3D surfaces without continuous actuation, enabling reusable morphing materials ...
Sawyer Thomas, Jeffrey Lipton
wiley +1 more source
Geometry‐Encoded Actuation as a Structural Interaction Layer in Origami Robots
Advanced Science, EarlyView.We present geometry‐encoded actuation (GEA), a design framework that integrates multistable origami with liquid crystal elastomer actuators to encode environmental interactions into autonomous structural responses. GEA enables programmable shape transformation without continuous sensing or complex control, achieving robust adaptive manipulation and ...
Jianshu Zhou +8 more
wiley +1 more source
Analyzing Laser Speckle Pattern Using the Discrete Cosine Transform
Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017 The use of Cosine transform to analyze the model-noise pattern alteration with different vibration model applied on multimode fiber optics are studied.
Inbethaq Mohammed Ali Abdul-Ameer
doaj