A Steganography Embedding Method Based on Hamming Coding and Histogram-Preserving

2019 ◽  
Vol 33 (14) ◽  
pp. 1954039
Author(s):  
Ya-Feng Li ◽  
Ren-Er Yang ◽  
Jie Cheng ◽  
Hong-Zhu Dai
Keyword(s):  
Digital Media ◽  
Adaptive Algorithm ◽  
Information Hiding ◽  
Entropy Analysis ◽  
Hamming Codes ◽  
Secret Information ◽  
Matrix Embedding ◽  
Before And After ◽  
Histogram Preserving ◽  
Break Even Point

This paper proposes an information hiding algorithm using matrix embedding with Hamming codes and histogram preservation in order to keep the histogram of the image unchanged before and after hiding information in digital media. First, the algorithm uses matrix embedding with Hamming codes to determine the rewriting bits of the original image, rewrite and flip them, and successfully embed the secret information. Then, according to the idea of a break-even point, a balanced pixel frequency adaptive algorithm is proposed and each embedded bit of secret information is detected and compensated by the adjacent bit of histogram data, so that the histogram change of the image before and after information hiding is minimized. At present, most of the histogram distortion values after steganography are generally over 1000 or even higher. As a contrast, the method proposed in this paper can keep the histogram distortion values to be less than 1000. The feasibility and effectiveness of the algorithm are verified by relative entropy analysis as well. The experimental results also show that the algorithm performs well in steganographic analyses of images.

scholarly journals Using Bidimensional Multiscale Entropy Analysis of Ultrasound Images to Assess the Effect of Various Walking Intensities on Plantar Soft Tissues

Entropy ◽  
2021 ◽  
Vol 23 (3) ◽  
pp. 264
Author(s):  
Ben-Yi Liau ◽  
Fu-Lien Wu ◽  
Keying Zhang ◽  
Chi-Wen Lung ◽  
Chunmei Cao ◽  
...  
Keyword(s):  
Soft Tissues ◽  
Linear Analysis ◽  
Multiscale Entropy ◽  
Ultrasound Images ◽  
Entropy Analysis ◽  
Nonlinear Complexity ◽  
Human Movements ◽  
Before And After ◽  
Walking Performance ◽  
Linear And Nonlinear

Walking performance is usually assessed by linear analysis of walking outcome measures. However, human movements consist of both linear and nonlinear complexity components. The purpose of this study was to use bidimensional multiscale entropy analysis of ultrasound images to evaluate the effects of various walking intensities on plantar soft tissues. Twelve participants were recruited to perform six walking protocols, consisting of three speeds (slow at 1.8 mph, moderate at 3.6 mph, and fast at 5.4 mph) for two durations (10 and 20 min). A B-mode ultrasound was used to assess plantar soft tissues before and after six walking protocols. Bidimensional multiscale entropy (MSE2D) and the Complexity Index (CI) were used to quantify the changes in irregularity of the ultrasound images of the plantar soft tissues. The results showed that the CI of ultrasound images after 20 min walking increased when compared to before walking (CI4: 0.39 vs. 0.35; CI5: 0.48 vs. 0.43, p < 0.05). When comparing 20 and 10 min walking protocols at 3.6 mph, the CI was higher after 20 min walking than after 10 min walking (CI4: 0.39 vs. 0.36, p < 0.05; and CI5: 0.48 vs. 0.44, p < 0.05). This is the first study to use bidimensional multiscale entropy analysis of ultrasound images to assess plantar soft tissues after various walking intensities.

Security Secret Information Hiding Based on Hash Function and Invisible ASCII Characters Replacement

2016 ◽  
Author(s):  
Feng Liu ◽  
Pengpeng Luo ◽  
Zhujuan Ma ◽  
Cheng Zhang ◽  
Yiwen Zhang ◽  
...  
Keyword(s):  
Information Hiding ◽  
Hash Function ◽  
Secret Information

scholarly journals Disminución de la ansiedad en las víctimas del bullying durante el confinamiento por el COVID-19

2021 ◽  
Vol 21 (65) ◽  
Author(s):  
María Isabel Gómez León
Keyword(s):  
Mental Health ◽  
Academic Performance ◽  
Social Interaction ◽  
Digital Media ◽  
Before And After ◽  
Victim Group ◽  
Salud Mental ◽  
Anxiety Depression ◽  
Victims Of Bullying

Los factores estresantes asociados a la pandemia por el COVID 19 han tenido importantes consecuencias en la salud mental de muchos adolescentes, sin embargo, es posible que este confinamiento junto con los medios digitales disponibles para el aprendizaje y la interacción social hayan supuesto un alivio para aquellos que eran víctimas de bullying. En esta investigación se comparan las puntuaciones que han obtenido 276 adolescentes (94 víctimas de bullying y 182 no víctimas) de entre 12 y 14 años, en ansiedad, depresión, rendimiento académico y ciberbullying antes y después del confinamiento. Antes del confinamiento las víctimas obtuvieron puntuaciones significativamente mayores en ansiedad, depresión y ciberbullying y menores en rendimiento académico. Durante el confinamiento las diferencias en ansiedad se invirtieron, siendo significativamente menores en el caso de las víctimas de bullying, quienes, además, obtuvieron puntuaciones significativamente menores en depresión y en ciberbullying que antes de la pandemia. Sin embargo, el rendimiento académico descendió significativamente en el grupo no-víctimas mientras que no se apreciaron cambios significativos en las puntuaciones de ciberbullying. The stressors associated with the pandemic by COVID 19 have had important consequences on the mental health of many adolescents, however, it is possible that this confinement along with the digital media available for learning and social interaction have provided relief for those who were victims of bullying.. This research compares the scores obtained by 76 adolescents (94 victims of bullying and 182 not victims) between 12 and 14 years old, in anxiety, depression, academic performance and cyberbullying before and after confinement. Before confinement, the victims obtained significantly higher scores in anxiety, depression and cyberbullying and lower scores in academic performance. During confinement, the differences in anxiety were reversed, being significantly lower in the case of victims of bullying, who also obtained significantly lower scores in depression and cyberbullying than before confinement. However, academic performance decreased significantly in the non-victim group, while no significant changes in cyberbullying scores were observed.

Reimagining the Audience-Dancer Relationship Through Mobile Augmented Reality

2020 ◽  
pp. 119-141
Author(s):  
Patrick Pennefather ◽  
Claudia Krebs ◽  
Julie-Anne Saroyan
Keyword(s):  
Augmented Reality ◽  
Research And Development ◽  
Digital Media ◽  
Motion Capture ◽  
Development Process ◽  
Mobile Augmented Reality ◽  
Traditional Use ◽  
Dance Company ◽  
Before And After

The research and development of an augmented reality (AR) application for Vancouver-based dance company Small Stage challenged a team of students at a graduate digital media program to understand how AR might reinvent the audience-dancer relationship. This chapter will chronicle the AR and choreographic development process that occurred simultaneously. Based on the documentation of that process, a number of insights emerged that dance creators and AR developers may find useful when developing an AR experience as counterpart to a live dance production. These include (1) understanding the role of technology to support or disrupt the traditional use of a proscenium-based stage, (2) describing how AR can be used to augment an audience's experience of dance, (3) integrating a motion capture pipeline to accelerate AR development to support the before and after experience of a public dance production.

scholarly journals EFFECTIVENESS OF BUSINESS TRANSFORMATION STRATEGY TO INCREASING COMPANY'S INCOME IN PRODUCTS DOOH (DIGITAL OUT OF HOME) IN PT. METRA DIGITAL MEDIA

Tibuana ◽  
2019 ◽  
Vol 2 (01) ◽  
pp. 33-37
Author(s):  
Yitno Utomo
Keyword(s):  
Data Analysis ◽  
Digital Media ◽  
Transformation Process ◽  
Statistical Data Analysis ◽  
Business Transformation ◽  
Before And After ◽  
Home Product ◽  
The Difference ◽  
And Control ◽  
Transformation Strategy

     This reseach to study the effectiveness of business transformation strategy in PT Metra Digital Media and to know the difference  increasing of company earnings in DOOH (Digital Out Of Home) product in PT Metra Digital Media,  before and after  implementation of business transformation strategy. The sample cases in this research are 22 customer companies that have not followed the business transformation process, which is advertised through the directory and control samples, and 22 customer companies that have been following the business transformation process are advertising through DOOH (Digital Out Of Home). Calculation data analysis using SPSS (Statistical Data Analysis) test that Independent-Samples T-Test. The results showed that the effectiveness of the implementation of business transformation strategy applies to product indicator, payment method, service and sales, because the OR (Odd Ratio) value is higher in companies that choose DOOH, while those that are not effectively selected are indicator of the period of exposure and popularity, the difference  increasing of company earnings on DOOH (Digital Out Of Home) products at PT Metra Digital Media before and after the implementation of business transformation strategy is evidenced from p = 0,016 (sig <0,05) and  hypothesis is accepted.

The Architecture of Political Spaces: Trolls, Digital Media, and Deweyan Democracy

2017 ◽  
Vol 111 (1) ◽  
pp. 149-161 ◽  
Author(s):  
JENNIFER FORESTAL
Keyword(s):  
Social Media ◽  
Digital Media ◽  
John Dewey ◽  
Central Element ◽  
Democratic Politics ◽  
Future Research ◽  
Digital Environment ◽  
Key Characteristics ◽  
Before And After ◽  
Democratic Discourse

The problem of trolls exemplifies the challenges of building democratic communities in the digital environment of social media. Distinguishing trolls from activists can be difficult; democratic theorists have yet to adequately address how to prevent the former while remaining open to the latter. In this article, I outline a theory of democratic politics that takes space as a central element in shaping democratic interactions. Using the work of John Dewey, I draw out two key characteristics of democratic space: boundedness and flexibility. Using these criteria, I then evaluate Kinja, Gawker Media's commenting platform, both before and after trolls attacked the site in 2014. I find that in altering its boundaries to successfully protect against trolls, Kinja introduced a new problem: a lack of flexibility that continues to affect the possibility for democratic discourse on the platform. I conclude by suggesting how this theory of democratic space might shape future research.

The patriotism down under: Nationalized qualities and Australian media consumption of the 2016 Rio Olympic Games

2017 ◽  
Vol 54 (3) ◽  
pp. 325-347 ◽  
Author(s):  
Andrew C Billings ◽  
Olan KM Scott ◽  
Kenon A Brown ◽  
Melvin Lewis ◽  
Michael B Devlin
Keyword(s):  
National Identity ◽  
Digital Media ◽  
Olympic Games ◽  
Media Consumption ◽  
Significant Relationships ◽  
Before And After ◽  
The Olympic Games

A survey of 291 Australians before and after consuming varied levels of Olympic media revealed key relationships between national identity, psychological connections to the Olympic Games, and media consumption of the Rio Games. The desire for nationalized emulation significantly predicted televisual media consumption; and the desire for nationalized identification and protection significantly predicted both print and digital media consumption. Differential motivations for identifying with Australia, fan involvement, and media consumption all yielded significant relationships with connection to the Olympics as a whole. Theoretical and applied implications are delineated.

scholarly journals An Improved Information Hiding Method Based on Sparse Representation

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Minghai Yao ◽  
Miao Qi ◽  
Yugen Yi ◽  
Yanjiao Shi ◽  
Jun Kong
Keyword(s):  
Sparse Representation ◽  
Information Hiding ◽  
High Capacity ◽  
Cover Image ◽  
Biometric Authentication ◽  
Secret Information ◽  
Residual Image ◽  
Representation Method ◽  
Visual Attention Mechanism ◽  
Biometric Information

A novel biometric authentication information hiding method based on the sparse representation is proposed for enhancing the security of biometric information transmitted in the network. In order to make good use of abundant information of the cover image, the sparse representation method is adopted to exploit the correlation between the cover and biometric images. Thus, the biometric image is divided into two parts. The first part is the reconstructed image, and the other part is the residual image. The biometric authentication image cannot be restored by any one part. The residual image and sparse representation coefficients are embedded into the cover image. Then, for the sake of causing much less attention of attackers, the visual attention mechanism is employed to select embedding location and embedding sequence of secret information. Finally, the reversible watermarking algorithm based on histogram is utilized for embedding the secret information. For verifying the validity of the algorithm, the PolyU multispectral palmprint and the CASIA iris databases are used as biometric information. The experimental results show that the proposed method exhibits good security, invisibility, and high capacity.

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