• KSII Transactions on Internet and Information Systems (TIIS)
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• v.17 no.1
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• pp.120-144
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• 2023

With the expansion of digital communication networks, a considerable number of randomization techniques have been invented and implemented to enhance the different data transmission algorithms' levels of security. Steganography is among the data transmissions techniques used to hide secret data. Nowadays, several randomization techniques have been used in steganography to elevate the security of transmitted data. Unfortunately, the majority of these techniques lack some simplicity, efficiency, and flexibility, in addition to other limitations. This research presents a new randomization technique called Rand-Stego. Rand-Stego could be applied/practiced over any steganography technique. It provides simplicity and efficiency and elevates the security level. Examples of implementing the proposed technique on some steganography algorithms will be explored. The proposed and current techniques will be compared. The obtained results show Rand-Stego's superiority in terms of efficiency and flexibility when compared to the current techniques.

• Proceedings of the Korea Contents Association Conference
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• 2014.06a
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• pp.41-42
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• 2014

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.24 no.3
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• pp.73-79
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• 2013

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.18 no.9
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• pp.53-54
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• 2000

• Broadcasting and Media Magazine
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• v.1 no.3
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• pp.61-64
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• 1996

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2001.11a
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• pp.203-232
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• 2001

• Broadcasting and Media Magazine
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• v.7 no.1
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• pp.81-93
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• 2002

• The Journal of the Korea Contents Association
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• v.9 no.1
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• pp.205-214
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• 2009

There has been a change in the production of the movie and techniques of the expression in the digital technology which has been used universally since 2000. As the focus of the production system of the movie has moved from the production procedure centering around filming to the procedure centering around editing used by the digital tools. The flows and boundaries of the production system which is consist of pre-production, production and post-production are getting indistinct. In the point of view of aesthetics and technology, this kind of change expands the creativity and originality for the screenwriters and provides the reality and vitality which haven't been found in previous films for the audience. It also elevates the quality of the movie. However, this ‘illusionary spectacle' has a vulnerable point that shows the aura and details of the movie soundly for the audience.

• Journal of Digital Convergence
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• v.18 no.2
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• pp.395-401
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• 2020

With the popularization of smartphones and the development of digital technologies, new concepts that maximize interactive communication have begun to appear in marketing strategies. One of them is the gamification marketing strategy that combines games with marketing that induces customer interest and voluntary participation. Gamification is a compound word of 'game' and '-fication', and marketing cases using game formats are being implemented in various fields. Therefore, this study will identify the implications of the usage of gamification that has become a trend, and analyze the gamification techniques and factors shown in various cases to suggest the direction of gamification as an effective marketing strategy. Companies are actively using gamification in their marketing strategies in a variety of forms and apply gamification techniques such as challenge, competition, accomplishment, reward, and relationship. As a result of the case analysis, important factors commonly identified in the gamification techniques used in marketing are 'Accomplishment' and 'Rreward'. Using various products and benefits obtained through solving a given mission or task as game elements, it was found to be an effective strategy to induce consumers' interest and participation and to promote consumption by encouraging consumers' immersion.

• Asian Journal of Atmospheric Environment
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• v.5 no.1
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• pp.8-20
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• 2011

Atmospheric visibility is one of the indicators used to evaluate the status of air quality. Based on a conceptual definition of visibility as the maximum distance at which the outline of the selected target can be recognized, an image analysis technique is introduced here and an algorithm is developed for visibility monitoring. Although there are various measurement techniques, ranging from bulk and precise instruments to naked eye observation techniques, each has their own limitations. In this study, a series of image analysis techniques were introduced and examined for in-situ application. An imaging system was built up using a digital camera and was installed on the study sites in Incheon and Seoul separately. Visual range was also monitored by using a dual technology visibility sensor in Incheon and transmissometer in Seoul simultaneously. The Sobel mask filter was applied to detect the edge lines of objects by extracting the high frequency from the digital image. The root mean square (RMS) index of variation among the pixels in the image was substantially correlated with the visual ranges in Incheon and Seoul with correlations of $R^2$=0.88 and $R^2$=0.71, respectively. The regression line equations between the visual range and the RMS index in Incheon and Seoul were VR=$2.36e^{0.46{\times}(RMS)}$ and VR=$3.18e^{0.15{\times}(RMS)}$, respectively. It was also confirmed that the fine particles ($PM_{2.5}$) have more impacts to the impairment of visibility than coarse particles.