In the digital image watermarking community, developing a robust watermarking method has withdrawn attention in recent years. In this paper, robust image watermark algorithm is proposed which is based on histogram shape and Butterworth filtering that resist against geometric attack and signal processing attack by using invariance property of histogram to scaling and without exploiting robust fe...

This paper tries to provide a new perspective for the research of reversible watermarking based on histogram shifting of prediction errors. Instead of obtaining one prediction error for the current pixel, we calculate multiple prediction errors by designing a multi-prediction scheme. An asymmetric error histogram is then constructed by selecting the suitable one from these errors. Compared with...

We introduce a novel class of visual illusion -motion pareidolia -in which sequential presentations of random textures can trigger percepts of coherent apparent motion. In two experiments we presented observers with sequences of random 140x140 pixel arrays refreshing at 2.5Hz. In Experiment 1, observers were primed with a coherent motion pattern, such as fixed texture shifting up-and-down acros...

Protecting the ownership and controlling the copies of digital data have become very important issues in Internet-based applications. Reversible watermark technology allows the distortion-free recovery of relational databases after the embedded watermark data are detected or verified. In this paper, we propose a new, blind, reversible, robust watermarking scheme that can be used to provide proo...

The embedding capacity of a histogram-based reversible data hiding technique is primarily determined by the peak height of the histogram. Recently, some studies have tried to embed data in the histogram of prediction errors by modifying the error values and have better embedding efficiency. However, these methods offer no selective embedment mechanism to exclude the positions where the modifica...

In this paper, we are going to have a survey on one of data hiding techniques called "Reversible Data Hiding (RDH)". Due to this, basic principles and notions of RHD are introduced. Also, primary techniques as the principles of RHD are talked. They are: Pair-Wise Logical Computation (PWLC) data hiding technique and Data Hiding by Template ranking with symmetrical Central pixels (DHTC) technique...

Abstract Simulations of complex-valued Hopfield networks based on spin-torque oscillators can recover phase-encoded images. Sequences memristor-augmented inverters provide tunable delay elements that implement complex weights by phase shifting the oscillatory output oscillators. Pseudo-inverse training suffices to store at least 12 images in a set 192 oscillators, representing 16 × pixel The en...

Current progress in programmable electrostatic phase plates raises questions about their usefulness for specific applications. Here, we explore different designs such with the goal of correcting spherical aberration Transmission Electron Microscope (TEM). We numerically investigate whether a plate could provide down to 1 $\r{A}$ngstr\"om spatial resolution on conventional uncorrected TEM. Diffe...

a field study was undertaken with four farming systems (fs) such as; grasses and fodders, agro-forestry, agriculture (new farming systems) and shifting cultivation (old practice), to investigate the effect of land use on the soil properties, erosion and crop productivity on a loamy acidic alfisol. besides crops, the livestock were also kept and their dropping were incorporated in the respective...