Research on lossless restoration method of digital media image based on regularisation method

2021 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Mi Tian
Keyword(s):  
Digital Media ◽  
Media Image ◽  
Restoration Method ◽  
Regularisation Method

scholarly journals Cryptosystem for Secure Data Transmission using Advance Encryption Standard (AES) and Steganography

2019 ◽  
pp. 317-322 ◽  
Author(s):  
Musa. M. Yahaya ◽  
Aminat Ajibola
Keyword(s):  
Digital Media ◽  
Data Transmission ◽  
Data Security ◽  
Data Transfer ◽  
Business Owners ◽  
Advanced Encryption Standard ◽  
Least Significant Bit ◽  
Media Image ◽  
Key Players ◽  
Secure Data Transmission

Recently, the rate of data transfer over the internet globally has increased and this called for more data security as security of data is of great concern for individuals as well as business owners. Cryptography and steganography are two major key players for data security technique. Cryptography is use to perform encryption on the secrete message while steganography hides the secrete message in digital media, image in this regards. This paper employed these two techniques using Advanced Encryption Standard (AES) for the cryptography and Least Significant Bit (LSB) for the steganography. Combining the two algorithms ensured data integrity, data security, and flexibility. The changes in the secrete message carrier (Stego) is insignificant and is often not noticeable by the nicked eyes, thus this make the interception of the message often difficult by intruder.

scholarly journals SISTEM STEGANOGRAPHY DENGAN METODE LEAST SIGNIFCANT BIT (LSB) & METODE CAESAR CIPHER BERBASIS ANDROID

2020 ◽  
Vol 20 (1) ◽  
pp. 78-88
Author(s):  
Abrar Hiswara ◽  
Aida Fitriyani ◽  
Reza Adi Nugraha
Keyword(s):  
Digital Media ◽  
Data Security ◽  
Vital Role ◽  
Least Significant Bit ◽  
Application Development ◽  
Media Image ◽  
Java Programming ◽  
Rapid Application Development ◽  
Security Measure ◽  
Cyber Crimes

This research aims at information security in the form of document files, documents are casual but have a vital role, due to many cyber crimes that try or commit data theft, illegal access or misuse of documents that are used as a particular crime tool. the software development method uses the Rapid Application Development (RAD) model, while the research method applies the Least Significant Bit (LSB) method of hiding information into a digital media (image) as a steganographic technique and Caesar Cipher as a cryptographic technique that encrypts * document filename into aform Caesar randomly characters. The results of the study resulted in an android-based steganography system that uses the Java programming language, as data security for document systems using the least significant bit and caesar cipher method as a top priority and making the system more friendly and interactive to be used easily by users. Steganography system is considered to provide an alternative for users as a system that is able to maintain the confidentiality of documents and provide information to users of the importance of a data security measure.

scholarly journals Media Image of Jordan in Runet Media: Specifics of Non Personification

2021 ◽  
Vol 10 (1) ◽  
pp. 39-50
Author(s):  
Irina Volkova ◽  
Haya Ashour
Keyword(s):  
Digital Media ◽  
Social Values ◽  
Arab State ◽  
Binary Opposition ◽  
Web Based ◽  
Media Environment ◽  
Media Image ◽  
The Public ◽  
Russian Media ◽  
The Media

The article is a response to the discussion between Russian media researchers concerning the notion and meaning of media image. It outlines the key directions in the studies of the image of a state as media product, which influences the public opinion, social values and assumptions about the politics, economy and culture. Acknowledging the interdependence of a media image on stereotypes and archetypes, the authors put forward and test a hypothesis of effectiveness of forming a media image in the context of weakening this interdependence. They study the possibilities of forming a media image («by the media — for the society») in a reverse way, when the binary opposition of stereotyping could be destroyed via personification, and a socio-image («by the society — for the media») could be formed. In respect of a particular country, this procedure helps to realize and estimate the opportunities and contradictions of the digital media environment which is formed individually («journalist as subject») and institutionally («journalist as agent»). The research involved studying the media image of Jordan in web-based media publications in The Kommersant, The RBK, and The Rossiiskaya Gazeta in 2019. The choice of the country is explained by the fact that the King Abdullah II bin Al-Hussein, by his actions on the world stage and life style, weakens the archetypal inertia in the perception of the Arab state, which is a potential for forming a socio-image. The results of the study show that this potential is not utilized. The media image of the Hashemite Kingdom of Jordan in Ru-Net is formed institutionally to the benefit of Russia and is related to some stereotypes of the Arabs, and therefore, may be characterized as non personification.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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