检索结果-内蒙古大学图书馆

ACM International Conference on Multimedia (ACM Multimedia)

作者： Yang, Yang Zhang, Hanwang Zhang, Mingxing Shen, Fumin Li, Xuelong Univ Elect Sci & Technol China Chengdu Peoples R China Natl Univ Singapore Singapore 117548 Singapore Chinese Acad Sci Beijing 100864 Peoples R China

ISBN: (纸本)9781450334594

In recent years, tremendous research endeavours have been dedicated to seeking effective visual representations for facilitating various multimedia applications, such as visual annotation and retrieval. Nonetheless, existing approaches can hardly achieve satisfactory performance due to the scarcity of fully exploring semantic properties of visual codes. In this paper, we present a novel visual coding approach, termed as hierarchical semantic visual coding (HSVC), to effectively encode visual objects (e.g., image and video) in a semantic hierarchy. Specifically, we first construct a semantic-enriched dictionary hierarchy, which is comprised of dictionaries corresponding to all concepts in a semantic hierarchy as well as their hierarchical semantic correlation. Moreover, we devise an on-line semantic coding model, which simultaneously 1) exploits the rich hierarchical semantic prior knowledge in the learned dictionary, 2) reflects semantic sparse property of visual codes, and 3) explores semantic relationships among concepts in the semantic hierarchy. To this end, we propose to integrate concept-level group sparsity constraint and semantic correlation matrix into a unified regularization term. We design an effective algorithm to optimize the proposed model, and a rigorous mathematical analysis has been provided to guarantee that the algorithm converges to a global optima. Extensive experiments on various multimedia datasets have been conducted to illustrate the superiority of our proposed approach as compared to state-of-the-art methods.

关键词： semantic hierarchy dictionary hierarchy visual coding group lasso

来源：评论

学校读者我要写书评

暂无评论

Enhancing visual coding Through Collaborative Perception

引用

IEEE TRANSACTIONS ON COGNITIVE AND DEVELOPMENTAL SYSTEMS 2023年第4期15卷 1744-1753页

作者： An, Lingling Yan, Zhen Wang, Weizheng Liu, Jian K. Yu, Keping Xidian Univ Sch Comp Sci & Technol Xian 710071 Peoples R China City Univ Hong Kong Dept Comp Sci Hong Kong Peoples R China Univ Leeds Sch Comp Leeds LS2 9JT England Hosei Univ Grad Sch Sci & Engn Tokyo 1848584 Japan RIKEN RIKEN Ctr Adv Intelligence Project Tokyo 1030027 Japan

A central challenge facing the nature human-computer interaction involves understanding how neural circuits process visual perceptual information to improve the user's operation ability under complex tasks. visual coding models aim to explore the biological characteristics of retinal ganglion cells to provide quantitative predictions of responses to a range of visual stimuli. The existing visual coding models lack adaptability in natural and complex scenes. Therefore this article proposes an enhanced visual coding model through collaborative perception. Our model first extracts the multimodal spatiotemporal features of the input video to simulate the retinal response characteristics adaptively. Second, it uses the basis function to compile the input stimulus into a multimodal stimulus matrix. Afterward, the upstream and downstream filters reform the stimulus matrix to generate the spike sequence. Experiments show that the proposed model reproduces the physiological characteristics of ganglion cells in the biological retina, leading to the high accuracy, good adaptability, and biological interpretability in comparison with its rivals.

关键词： Feature compilation multimodal stimulus nonlinearity visual coding

来源：评论

学校读者我要写书评

暂无评论

A geometric framework for nonlinear visual coding

引用

OPTICS EXPRESS 2000年第4期7卷 155-165页

作者： Barth, E Watson, AB NASA Ames Res Ctr Moffett Field CA 94035 USA

It is argued that important aspects of early and middle level visual coding may be understood as resulting from basic geometric processing of the visual input. The input is treated as a hypersurface defined by image intensity as a function of two spatial coordinates and time. Analytical results show how the Riemann curvature tensor R of this hypersurface represents speed and direction of motion. Moreover, the results can predict the selectivity of MT neurons for multiple motions and for motion in a direction along the optimal spatial orientation. Finally, a model based on integrated R components predicts global-motion percepts related to the barber-pole illusion. (C) 2000 Optical Society of America.

关键词： .resulting two-dimensional defined selectivity tensor motions Motion Detection direction of motion Intrinsically illusion spatial orientation Geometric Framework visual coding visual input hypersurface image intensity MT neurons visual Processing Zetzsche linear filters

来源：评论

学校读者我要写书评

暂无评论

The Influence of HUD Information visual coding on pilot's Situational Awareness 9

The Influence of HUD Information Visual Coding on pilot's Si...

引用

9th International Conference on Intelligent Human-Machine Systems and Cybernetics (IHMSC)

作者： Sun, Guoqiang Wanyan, Xiaoru Wu, Xu Zhuang, Damin Beihang Univ Sch Aeronaut Sci & Engn 37 Xueyuan Rd Beijing 100191 Peoples R China

ISBN: (纸本)9781538630228

In order to investigate the effect of Head-up Display (HUD)'s information visual coding on operator's situational awareness(SA), this study designed an ergonomics experiment based on Endsley's theory of three-level situation awareness. Thirty-two subjects were recruited to perform HUD interface monitoring task under different visual coding conditions(small aircraft symbol, reverse position of heading and rolling indictors and representation of airspeed and altitude indictors). Meanwhile, Situation Awareness Global Assessment Technique (SAGAT), three-dimensional Situational Awareness Rating Technique(3-D SART), task performance and physiological measurements were adopted to evaluate operator's SA. The experimental results revealed that the circular type of small aircraft symbol performed better, the heading indictor located at the top of the HUD interface was more conducive to the operators' SA, the airspeed representation with digital window and the altitude representation with single pointer executed better. The experimental results can be used to provide ergonomics references for design and optimization of HUD interface.

关键词： situation awareness Head-up Display ergonomics visual coding SAGAT

来源：评论

学校读者我要写书评

暂无评论

Human-rating design of visual coding based on the airworthiness requirements 3

Human-rating design of visual coding based on the airworthin...

引用

3rd International Symposium on Aircraft Airworthiness (ISAA)

作者： Xiao, Xu Wanyan, Xiaoru Zhuang, Damin Beihang Univ Sch Aeronaut Sci & Engn Beijing 100191 Peoples R China

China is carrying out the development of civil aviation aircraft which contains over 150 seats and will be flight-tested in 2014. Aiming at the visual coding design of the integrated display system for aircraft cockpit, it is considered that the human-rating design of visual coding has a direct effect on the ergonomics and safety of the pilot operating an aircraft. Therefore, this study focuses on the human-rating design of visual coding based on the airworthiness requirements, including the interpretation and analysis of the ergonomics airworthiness requirements, the ergonomics design of character size and color matching of visual coding. Drawn by the study: European and American airworthiness regulations have the same basic requirements but stronger operability compared with Chinese ones;the ergonomics design method of visual coding proposed in the current study is feasible, and the experiment results of the character size and color matching are consistent with the regulations published by the European and American airworthiness authorities, which can be applied to the development of China's airworthiness regulations. (C) 2014 Published by Elsevier Ltd.

关键词： Airworthiness Civil aircraft cockpit visual coding Human-rating design

来源：评论

学校读者我要写书评

暂无评论

visual coding of Intents for Safety of Substation Design

引用

Procedia Computer Science 2022年 208卷 36-44页

作者： Bing Wu Yuanbin Song

The automatic safety review of substation design model greatly depends on the formal representation of the safety constraints residing in the building codes written in natural language. In order to overcome the difficulties arising from the hard coding and semantic web approaches, the visual coding method has been studied for representing safety constraints. Nevertheless, very little research explores the formal representation of safety constraints from the query intent viewpoint. Therefore, seven basic query intents are categorized, and simultaneously their mapping with Gremlin query segments is also defined. Then, the visually coding framework is also developed to simplify the representation of query intents. The case study implies that the visual coding of query intents provides an effective and explicit vehicle to describe the safety constraints. In this way, the natural language safety constraints can be automatically converted into Gremlin codes, and moreover the declarative manner of integrating Gremlin queries not only further save time on manually sequencing multiple query tasks, but also can optimize the traversal of graph database.

关键词： Intent representation visual coding knowledge representation safety constraint design review

来源：评论

学校读者我要写书评

暂无评论

Computational assessment of visual coding across mouse brain areas and behavioural states

引用

FRONTIERS IN COMPUTATIONAL NEUROSCIENCE 2023年 17卷 1269019页

作者： Xie, Yizhou Sadeh, Sadra Imperial Coll London Dept Brain Sci London England

IntroductionOur brain is bombarded by a diverse range of visual stimuli, which are converted into corresponding neuronal responses and processed throughout the visual system. The neural activity patterns that result from these external stimuli vary depending on the object or scene being observed, but they also change as a result of internal or behavioural states. This raises the question of to what extent it is possible to predict the presented visual stimuli from neural activity across behavioural states, and how this varies in different brain *** address this question, we assessed the computational capacity of decoders to extract visual information in awake behaving mice, by analysing publicly available standardised datasets from the Allen Brain Institute. We evaluated how natural movie frames can be distinguished based on the activity of units recorded in distinct brain regions and under different behavioural states. This analysis revealed the spectrum of visual information present in different brain regions in response to binary and multiclass classification *** cortical areas showed highest classification accuracies, followed by thalamic and midbrain regions, with hippocampal regions showing close to chance accuracy. In addition, we found that behavioural variability led to a decrease in decoding accuracy, whereby large behavioural changes between train and test sessions reduced the classification performance of the decoders. A generalised linear model analysis suggested that this deterioration in classification might be due to an independent modulation of neural activity by stimulus and behaviour. Finally, we reconstructed the natural movie frames from optimal linear classifiers, and observed a strong similarity between reconstructed and actual movie frames. However, the similarity was significantly higher when the decoders were trained and tested on sessions with similar behavioural *** analysis provides a system

关键词： visual coding decoding behaviour encoding mouse visual cortex neural activity

来源：评论

学校读者我要写书评

暂无评论

Human-rating Design of visual coding Based on the Airworthiness Requirements

引用

Procedia Engineering 2014年 80卷 93-100页

作者： Xu Xiao Xiaoru Wanyan Damin Zhuang School of Aeronautic Science and Engineering Beihang University Beijing 100191 China

China is carrying out the development of civil aviation aircraft which contains over 150 seats and will be flight-tested in 2014. Aiming at the visual coding design of the integrated display system for aircraft cockpit, it is considered that the human-rating design of visual coding has a direct effect on the ergonomics and safety of the pilot operating an aircraft. Therefore, this study focuses on the human-rating design of visual coding based on the airworthiness requirements, including the interpretation and analysis of the ergonomics airworthiness requirements, the ergonomics design of character size and color matching of visual coding. Drawn by the study: European and American airworthiness regulations have the same basic requirements but stronger operability compared with Chinese ones; the ergonomics design method of visual coding proposed in the current study is feasible, and the experiment results of the character size and color matching are consistent with the regulations published by the European and American airworthiness authorities, which can be applied to the development of China's airworthiness regulations.

关键词： Airworthiness Civil aircraft cockpit visual coding Human-rating design

来源：评论

学校读者我要写书评

暂无评论

The effects of visual and verbal coding mnemonics on learning Chinese characters in computer-based instruction

引用

ETR&D-EDUCATIONAL TECHNOLOGY RESEARCH AND DEVELOPMENT 2004年第3期52卷 23-38页

作者： Kuo, MLA Hooper, S Univ Minnesota Coll Educ & Human Dev Minneapolis MN USA

The effects of different approaches to learning Chinese characters were investigated. Ninety-two high-school students were randomly assigned to one of five treatment groups: translation, verbal mnemonics, visual mnemonics, dual-coding mnemonics, or self-generated mnemonics. All groups received instruction and completed posttests in a computer-based environment. The results indicate that participants who generated their own mnemonics demonstrated higher posttest performance than those in visual coding, verbal coding, and translation groups;subjects in the dual coding group scored higher than those in the translation group. Those who generated their own mnemonics spent more time on task than any other group, and, those in the verbal coding group took more time than those in the translation group. Survey and qualitative data suggest that learners' interpretations of the Chinese characters were rooted in their cultural backgrounds and personal experiences.

关键词： .treatment groups qualitative data time on task pictures Posttests Learning Chinese Characters verbal mnemonics visual mnemonics own mnemonics visual coding dual coding group translation group verbal coding group

来源：评论

学校读者我要写书评

暂无评论

visual and unplugged coding with smart toys 2022

Visual and unplugged coding with smart toys

引用

16th Working Conference on Advanced visual Interfaces (ACM AVI)

作者： Capecchi, Sara Gena, Cristina Lombardi, Ilaria Univ Turin CS Dept Turin Italy

ISBN: (纸本)9781450397193

Our Computer science k-12 education research group the educational toy company Quercetti have been collaborating together to design and manufacture toys that help stimulate and consolidate so-called computational thinking. This approach has been inspired by methods already consolidated in the literature and widespread worldwide such as the Bebras tasks and CS-Unplugged. This paper describes two of these smart toys, their design process, some evaluation's results, and finally feedback and reviews from buyers. The main activities proposed by these toys leverage visual coding through small colored physical items (e.g., pegs and balls) to deliver the unplugged activities to young users.

关键词： CS unplugged CS education visual coding

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：