• Title, Summary, Keyword: Selective Attention

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Recognition of Superimposed Patterns with Selective Attention based on SVM (SVM기반의 선택적 주의집중을 이용한 중첩 패턴 인식)

  • Bae, Kyu-Chan;Park, Hyung-Min;Oh, Sang-Hoon;Choi, Youg-Sun;Lee, Soo-Young
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.42 no.5
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    • pp.123-136
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    • 2005
  • We propose a recognition system for superimposed patterns based on selective attention model and SVM which produces better performance than artificial neural network. The proposed selective attention model includes attention layer prior to SVM which affects SVM's input parameters. It also behaves as selective filter. The philosophy behind selective attention model is to find the stopping criteria to stop training and also defines the confidence measure of the selective attention's outcome. Support vector represents the other surrounding sample vectors. The support vector closest to the initial input vector in consideration is chosen. Minimal euclidean distance between the modified input vector based on selective attention and the chosen support vector defines the stopping criteria. It is difficult to define the confidence measure of selective attention if we apply common selective attention model, A new way of doffing the confidence measure can be set under the constraint that each modified input pixel does not cross over the boundary of original input pixel, thus the range of applicable information get increased. This method uses the following information; the Euclidean distance between an input pattern and modified pattern, the output of SVM, the support vector output of hidden neuron that is the closest to the initial input pattern. For the recognition experiment, 45 different combinations of USPS digit data are used. Better recognition performance is seen when selective attention is applied along with SVM than SVM only. Also, the proposed selective attention shows better performance than common selective attention.

The Change of 'Attention Resources' and 'Space-Memory' by Lighting focusing on 'Selective Attention (선택적 주의 관점에서 본 조명에 의한 주의 자원과 공간 기억의 변화)

  • Seo, Ji-Eun
    • Korean Institute of Interior Design Journal
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    • v.25 no.2
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    • pp.41-49
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    • 2016
  • The purpose of this study is to analyze the change and to compare to the difference of 'selective elements' and 'space-memory' focusing on the theory, 'selective attention' through the survey results. In this study, In this study, the lighting is considered a important factor in the change of 'selective elements'. this survey is to find the selective elements of participants and to measure the spatial sensitivity of respondents through 'self- test'. The analysis in this study is conducted by descriptive statistics, t-test and one way ANOVA by SPSS program 22. The results of this study are as following; Firstly, 'attention-element' could be classified with 4 types, 'shape', 'material', 'contrast' and 'combination'. 'shape' could divide into 'structure' and' furniture and object'. In case of 'material', it could section with 'pattern' and 'color'. Secondly, through the results of study, 'attention-element' is different each space during the day in detail. But we could know that 'shape' is the important element of the 'attention-elements' during the day through comparison of this result. That means users consider this as a important factor when they evaluate the space. Therefore, it is effective way designers to consider 'shape' as the first element when they want to conduct the special sensitivity of users in the space through planning. On the other hand, what selective elements of users are different by the lighting situation should be acknowledged by designers. And they should think the kinds of selective elements are more various when lighting turns on than turns off.. Thirdly, through the results such as the meaningful difference of space-memory of users according to the change of 'attention-elements', designers should judge about which kind of feeling of users to the space do you want lead in the design process. For the effective feedback between spaces and users to induce the same emotion of users, designers need to consider the unified design and the individual design both. Also, we will regard the differences in the users' emotion to the space according to the lighting situation when we design the space.

Relationships between Selective Attention Bias for Fear Stimuli and Hallucination in Patients with Schizophrenia : A Preliminary Study (조현병 환자에서 불안자극에 대한 선택적 주의 편향과 환청과의 연관성 : 예비 연구)

  • Kim, Han-Suk;Han, Jin-Hee;Hong, Seung-Chul;Jeong, Jong-Hyun;Lim, Hyun-Kook;Kim, Tae-Won;Um, Yoo-Hyun;Chae, Jeong-Ho;Lee, Kyoung-Uk;Seo, Ho-Jun
    • Anxiety and mood
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    • v.12 no.1
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    • pp.7-12
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    • 2016
  • Objective : This study was conducted to evaluate the relationships between selective attention bias for fear stimuli and hallucination in patients with schizophrenia Method : A total of 66 patients with schizophrenia admitted to psychiatry clinics were included in the study. Selective attention bias was measured by the dot-probe task. Patient symptoms were measured using the Positive and Negative Symptom Scale, Psychotic Symptom Rating Scale (PSYRATS), Korean version of the Scale to Assess Unawareness of Mental Disorder, and Clinical Global Impression-Severity scale. Results : Selective attention bias was correlated with the hallucination subscale of PSYTATS (r=0.268, p=0.029). No correlation was found between selective attention bias and other clinical measures. There was no significant difference, but a statistical trend was found (p=0.092) in hallucination severities between the biased and non-biased groups. Conclusion : The results suggest that selective attention bias for fear stimuli is associated with auditory hallucination. This preliminary study suggests the possibility of correlation between auditory hallucination in the psychotic domain and anxiety of the affective component.

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A New Performance Evaluation Method for Visual Attention System (시각주의 탐색 시스템을 위한 새로운 성능 평가 기법)

  • Cheoi, Kyungjoo
    • Journal of Information Technology Services
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    • v.16 no.1
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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.

A Motion-driven Selective Visual Attention System (모션 기반 선택적 주의 시스템)

  • Park Min-Chul;Cheoi Kyung-Joo
    • The Journal of the Korea Contents Association
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    • v.5 no.6
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    • pp.87-96
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    • 2005
  • In this paper, a selective visual attention module based on motion stimuli is introduced for the purpose of detecting ROI(region of interest) or FOA(focus of attention) in motion pictures. Analysis of motion fields in our approach is in direct contrast to some of the previous studies of selective visual attention module. Motion that presents temporal visual saliency in an aspect between two successive frames is analyzed based on psychological studies in 'DORF(double opponent receptive fields)' and 'NF(noise filtration)' in MT(middle temporal cortex). Analyzed results are integrated based on the theory of 'motion integration' in MT to obtain a single conspicuous region. Experiments through a human subjective evaluation showed generally accepted results.

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Effects of mindfulness-based qigong for children's concentration ability (마음챙김 기공이 소아청소년의 주의집중력에 미치는 영향)

  • Hong, Soon-Sang;Cho, Seung-Hun
    • Journal of Oriental Neuropsychiatry
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    • v.23 no.2
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    • pp.49-58
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    • 2012
  • Objectives : The purpose of this study is to examine the effects of Mindfulness-based concentration qigong for children (MBCQ-C) in healthy children with subjective poor attention. Methods : This study examined the effects of MBCQ-C on healthy children with subjective poor attention, who vistied Korean medicine hospital neuropsychiatry outpatient clinic. The MBCQ-C was practiced with 11 participants, 2 of them quit in the middle of the program, and hence, they were excluded for data analysis. MBCQ-C consisted of 8 sessions, and each session took about 60 minutes. The outcome measurement was Frankfurter Aufmerksamkeits-Inventar (FAIR), which measured selective attention, self-control and sustained attention. Results : The results of this study showed that selective attention, and sustained attention were significantly improved. Self-control also improved, but without any statistical significance. These results indicate MBCQ-C was effective for the improvement of attention abilities, but self-control, including upper cognition area needs more consistent exercise. Conclusions : The MBCQ-C consisting of 8 sessions were shown to be an effective intervention in improving the attention abilities of healthy children with subjective poor attention.

Analysis of Elementary School Students' Visual Attention on the Editorial Design of 'Structure and Function of Our Body' in the 2007·2009 Revised Elementary Science Textbook (2007·2009 개정 초등 과학 교과서 '우리 몸의 구조와 기능' 단원의 편집디자인에 따른 초등학생들의 시각적 주의 분석)

  • Shin, Won-Sub
    • Journal of Korean Elementary Science Education
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    • v.36 no.4
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    • pp.428-438
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    • 2017
  • The purpose of this study is to analyze the visual attention of elementary school students according to the editorial design of the 2007 2009 revised elementary science textbook 'Structure and function of our body'. For this purpose, eye movements were collected while elementary school students were watching real textbooks wearing mobile eye tracker. The BeGaze 3.7 program of SMI company was used analyzing eye movements. Twenty-six elementary school students participated voluntarily in mobile tracking research. Elementary students learned the contents of textbook related to 'digestive organ' and 'respiratory organ' by using double reading learning strategy. The results of this study are as follows. First, as a result of pre- and post-knowledge tests, there was no statistically significant difference in learning effect between 2007 revised and 2009 revised textbook editing design. Second, elementary school students tended to give more visual attention to text than textbook illustrations. Third, the selective attention and persistent attention of elementary students showed a very strong positive correlation (.940), but the selective attention and self-control showed a strong positive correlation (.499). Fourth, students with high level of attention and low level showed high visual occupancy in text than in illustrations. Fifth, elementary school students preferred the 2009 revised science textbook to the 2007 revised.

Features of Selective Attention shown by Difference of Space Type in Department Stores - Focused on Observation Features Over Observation Time - (백화점 공간의 유형 차이에 나타난 선택적 주의집중 특성 - 주시시간의 경과에 나타난 주시특성을 중심으로 -)

  • Choi, Gae-Young;Kim, Jong-Ha
    • Korean Institute of Interior Design Journal
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    • v.24 no.6
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    • pp.145-153
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    • 2015
  • For this research with the objects of spaces in two department stores which can be referred to as representative facility of commercial space, observation test has carried out to estimate how much visitors rivet their eyes to the display of shops. In addition, to find out what effect the difference among the department types has on the selective attention to space element, the observation time was applied as a medium for estimation. The followings are the result from analyzing the observation frequency and the observation intensity feature of each section where the characteristics of design could be found at attention. First, both images of A and B had concentrative dominant-observation at left shops. In case of Image A, Customers began to observe the right shops very attentively after 25 seconds, and with Image B, the attentive observation at right and left took place alternatively after 35 seconds. In other words, regardless of the characteristics of shop displays, the left shops were observed first while in case of the observation after the early and middle time-frame the characteristics of shops were found to have effects on observation. Second, the normal observation showed some difference among attention sections over time while on the whole both images of A and B had the same highly attentive observation at the middle space. Accordingly, it could be concluded that the middle space was playing a faithful role as background for commercial spaces. Third, the ignorant observation, which is the opposite to the attentive observation, was found different between the images of A and B. When the ignorant observation is considered to have intentionality, it will be possible to set up the display which may attract the attention aggressively by the process of figuring out the characteristics of ignored shops.

Selective Attentive Learning for Fast Speaker Adaptation in Multilayer Perceptron (다층 퍼셉트론에서의 빠른 화자 적응을 위한 선택적 주의 학습)

  • 김인철;진성일
    • The Journal of the Acoustical Society of Korea
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    • v.20 no.4
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    • pp.48-53
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    • 2001
  • In this paper, selectively attentive learning method has been proposed to improve the learning speed of multilayer Perceptron based on the error backpropagation algorithm. Three attention criterions are introduced to effectively determine which set of input patterns is or which portion of network is attended to for effective learning. Such criterions are based on the mean square error function of the output layer and class-selective relevance of the hidden nodes. The acceleration of learning time is achieved by lowering the computational cost per iteration. Effectiveness of the proposed method is demonstrated in a speaker adaptation task of isolated word recognition system. The experimental results show that the proposed selective attention technique can reduce the learning time more than 60% in an average sense.

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