• 대한인간공학회지
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• 제31권6호
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• pp.705-713
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• 2012

Objective: The aim of this study is to predict human visual target search using ACT-R cognitive architecture in real scene images. Background: Human uses both the method of bottom-up and top-down process at the same time using characteristics of image itself and knowledge about images. Modeling of human visual search also needs to include both processes. Method: In this study, visual target object search performance in real scene images was analyzed comparing experimental data and result of ACT-R model. 10 students participated in this experiment and the model was simulated ten times. This experiment was conducted in two conditions, indoor images and outdoor images. The ACT-R model considering the first saccade region through calculating the saliency map and spatial layout was established. Proposed model in this study used the guide of visual search and adopted visual search strategies according to the guide. Results: In the analysis results, no significant difference on performance time between model prediction and empirical data was found. Conclusion: The proposed ACT-R model is able to predict the human visual search process in real scene images using salience map and spatial layout. Application: This study is useful in conducting model-based evaluation in visual search, particularly in real images. Also, this study is able to adopt in diverse image processing program such as helper of the visually impaired.

• 대한산업공학회지
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• 제41권4호
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• pp.389-395
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• 2015

According to much research on cognitive science, the impact of the scene-context on human visual search in real-world images could be as important as the saliency. Therefore, this study proposed a method of Adaptive Control of Thought-Rational (ACT-R) modeling of visual search in real-world images, based on saliency and scene-context. The modeling method was developed by using the utility system of ACT-R to describe influences of saliency and scene-context in real-world images. Then, the validation of the model was performed, by comparing the data of the model and eye-tracking data from experiments in simple task in which subjects search some targets in indoor bedroom images. Results show that model data was quite well fit with eye-tracking data. In conclusion, the method of modeling human visual search proposed in this study should be used, in order to provide an accurate model of human performance in visual search tasks in real-world images.

• 한국IT서비스학회지
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• 제16권1호
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• pp.55-72
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• 2017

Many of the studies of visual attention that are currently underway are seeking ways to make application systems that can be used in practice, and obtained good results using not only simulated images but also real-world images. However, despite that previous studies of selective visual attention are models intended to implement the human vision, few experiments verified the models with actual humans and there is no standardized data nor standardized experimental method for actual images. Therefore, in this paper, we propose a new performance evaluation techniques necessary for evaluation of visual attention systems. We developed an evaluation method for evaluating the performance of the visual attention system through comparison with the results of the human experiments on visual attention. Human experiments on visual attention is an experiments where human beings are instinctively aware of the unconscious when images are given to humans. So it can be useful for evaluating performance of the bottom-up attention system. Also we propose a new selective attention system that guides the user to effectively detect ROI regions by using spatial and temporal features adaptively selected according to the input image. We evaluated the performance of proposed visual attention system through the developed performance evaluation method, and we could confirm that the results of the visual attention system are similar to those of the human visual attention.

• 대한인간공학회지
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• 제11권1호
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• pp.3-12
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• 1992

To put the binocular 3-D images system into practical use, it is required to investigate the relationship between the system and men and to make ergonomic evaluation of the system. In this study, we perform a comparative analysis of the changes in the accommodation and pupil functions before and afer observing binocular 3-D images a sthe visual distance varies. From the experiment, we obtained the following results: (1) The discordance in the distance informatioons on the accommodation and pupil functions when obwerving 3-D images is compensated by the miosis and altering the focal depth. (2) From the consideration of the effect of the visual distance condition on the visual functions, it is thoughth that the visual functions are stabilized at the dark focus in the sense that the changes in the tension and relazation afer observing the 3-D images are minimized.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1099-1102
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• 2009

Conventional stereoscopic (3D) displays using binocular parallax generate unnatural conflicts between convergence and accommodation. Those conflicts can affect the ability to fuse binocular images and may cause visual fatigue. This study examined time-series changes in visual fatigue and depth sensation while viewing stereoscopic images with changing parallax. We examined the physiological changes, including the subjective symptoms of visual fatigue, when viewing five parallax conditions. The time-series results suggest that 2D and 3D images produce significantly different types of visual fatigue over the range of binocular disparity.

• 디지털콘텐츠학회 논문지
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• 제13권4호
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• pp.531-538
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• 2012

시각암호는 복잡한 암호학적 연산 없이 분산된 영상을 중첩함으로써, 인간의 시각에 의해 비밀영상을 직접 복원할 수 있는 방법이다. 최근까지 시각암호 분야는 크게 복호화 된 영상의 해상도를 향상시키기 위한 비밀 분산법, 분산된 영상의 크기가 변하지 않는 비밀 분산법 그리고 크기조절에 강인한 비밀 분산법 등에 관하여 연구되고 있다. 시각암호 그 자체는 단순히 분산된 영상만 이용하기 때문에 공격받기 쉽다. 따라서 비밀영상을 안전하게 공유할 수 있는 시각암호 구조가 필요하기 때문에 본 논문에서는 실제 사용될 수 있는 기본적인 시각암호 구조에서 커버영상을 이용해 개선된 시각암호 구조를 제안한다. 제안된 방법은 커버영상의 변조를 줄임으로써 steganalysis를 어렵게 하여 확률적으로 높은 안전성을 제공한다. 또한 잡음을 생성하지 않고, 비밀영상을 온전히 복원할 수도 있음을 보였다.

• 한국의류학회지
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• 제32권5호
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• pp.800-807
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• 2008

The purpose of this study is to compare the subjective texture of actual objects and their picture images on the Internet to find out a method to present visual images in order to supply information similar real objects. For this study, seven knit fabrics and four presentation methods of visual images including twice magnifications and two dimensions of 2D and 3D. The results of this study were as follows: There are significant differences among subjective textures evaluated by touching seven fabrics actually and we can verify the effects of fiber contents and loop length of knit on textures. We can find out differences of texture depending on presentation methods. In case of 2D evaluation of knits fabrics, visual images of real size present a little exact information on roughness and heaviness whereas those of twice magnification do roughness, wetness, softness and luster. And 3D images give us more exact information of textures on softness, heaviness and warmness, but rather twice enlarged 3D image can't supply an information of heaviness texture.

• Journal of information and communication convergence engineering
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• 제8권6호
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• pp.725-728
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• 2010

The subject collects information and constructs the outside world mainly through the sense of sight, though he cannot help but always see things from the viewpoint of the self-aware ego. While we are able to access the unconscious of which the latent desire is reflected in involuntary images and dream images, the substance of desire cannot be easily accessed due to the censorship of the ego and the super-ego, which makes images of the unconscious nonlinear, and allows us to pursue fantasies for pleasure. The original human desire to record and express visual objects has come true with technological fulfillments, and furthermore, digital technology has realized visual pleasure and desire, through simulation. The images that the unconscious produces and the images that digital technology produces are a visualization of objects by the subject's desire, and the subject realizes his pleasure through a visual fantasy. This study, based on the mechanism of the unconscious and the formal stamps of digital images, explores the interrelationship between the unconscious and digital images, both of which seek pleasure and desire.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.162-163
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• 2012

본 논문에서는 Kinect를 이용하여 획득된 영상으로 집적 영상 기반의 3D 디스플레이를 수행하기 위한 요소 영상 변환 방법을 제안한다. Kinect로 얻어지는 RGB영상과 깊이영상은 직접적으로 공간 3D영상으로 사용될 수 없기 때문에 집적영상 디스플레이용 요소 영상으로 변환이 필요하다. 이를 위해서 본 논문에서 RGB 영상과 깊이 영상으로부터 생성된 깊이 분할 영상에 대해서 기하광학적 매핑기법으로 요소 영상을 제작하였다. 제안한 시스템의 효용성을 보이기 위하여, Kinect에서 주로 사용되는 인체인식 기반으로 실험을 수행하고 그 결과를 보고한다.

• 복식
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• 제58권9호
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• pp.81-98
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• 2008

This research aims to analyze humorous images expressed in 2D graphics fashion illustrations and to propose application of 2D graphics in humorous images for fashion illustrations to suggest a more creative and relevant fashion illustration for contemporary culture. The result of this research were as follows: First, theories on reaction of humor can be classified into Incongruity theory, Superiority theory and Arousal and Relief theory. Humor in visual arts are classified in Visual Parody, Visual Pun, Visual Paradox and Visual Satire. Second, Visual Pun, Visual Parody, and Visual Satire are used for visualizing fashion illustration, and the foundations for many humor images were simple-colored, imaginative, and unreal settings. And it was also found out that the physical proportion of the models generally was 1(head):7(entire body), 1:8, 1:15 and the models were usually laughing and smiling. Tone was usually pastel and vivid, and posture was usually standing-position or sitting-position. Third, based on such results, fashion illustration works of humor image using 2D graphics were created. To concretize the humor image, 'gift' as a concept was chosen. Humor alleviates the tension and stress. It also brings laughter and pleasure to people's lives. Therefore humor image will be an effective way of expanding creativity in modern fashion illustration.