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Conference on Helmet and Head-Mounted Displays VIII

作者： Havig, PR Martinsen, GL Post, DL Reis, GA Heft, EL USAF HECV Crew Syst Interface Div Res Lab Wright Patterson AFB OH 45433 USA

ISBN: (纸本)0819449385

Recent advances in display technology have made it possible to superimpose color-coded symbology on the images produced by night vision goggles (NVGs). The resulting color mixture shifts the symbology's hue and saturation, which can impede recognition of the color code. We are developing, luminance-contrast specifications for color-coded NVG symbology to ensure accurate color recognition.

关键词： luminance contrast ratio night vision goggle color coding color recognition symbology

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High-quality anatomical structure enhancement for cardiac image dynamic volume rendering

High-quality anatomical structure enhancement for cardiac im...

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Medical Imaging 2008 Conference

作者： Zhang, Qi Eagleson, Roy Guiraudon, Gerard M. Peters, Terry M. Robarts Res Inst Imaging Res Labs London ON N6A 5C1 Canada

ISBN: (纸本)9780819471024

Dynamic volume rendering of the beating heart is an important element in cardiac disease diagnosis and therapy planning, providing the clinician with insight into the internal cardiac structure and functional behavior. Most clinical applications tend to focus upon a particular set of organ structures, and in the case of cardiac imaging, it would be helpful to embed anatomical features into the dynamic volume that are of particular importance to an intervention. A uniform transfer function (TF), such as is generally employed in volume rendering, cannot effectively isolate such structures because of the lack of spatial information and the small intensity differences between adjacent tissues. Explicit segmentation is a powerful way to approach this problem, which usually yields a single binary mask volume (MV), where a unit value in a voxel within the MV acts as a tag label representing the anatomical structure of interest (ASOI). These labels are used to determine the TF employed to adjust the ASOI display. Traditional approaches for rendering such segmented volumetric datasets usually deliver unsatisfactory results, such as noninteractive rendering speed, low image quality, intermixing artifacts along the rendered subvolume boundaries, and speckle noise. In this paper, we introduce a new "color coding" approach, based on the graphics processing unit (GPU) accelerated raycasting algorithm and a pre-integrated voxel classification method, to address this problem. The mask tag labels derived from segmentation are first smoothed with a Gaussian filter, and multiple TFs are designed for each of the MVs and the source cardiac volume respectively, mapping the voxel's intensity to color and opacity at each sampling point along the casting ray. The resultant values are composited together using a boundary color adjustment technique, which acts as "coding" the segmented anatomical structure information into the rendered source volume of the beating heart. Our algorithm produce

关键词： dynamic volumetric rendering segmentation and smoothing color coding anatomical structure enhancement CPU-based acceleration boundary color adjustment cardiac imaging image-guided cardiac intervention

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Feasibility of Text Visualization in Text Steganalysis 13

Feasibility of Text Visualization in Text Steganalysis

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13th International Conference on Intelligent Software Methodologies, Tools, and Techniques (SoMeT)

作者： Ab Rauf, Rose Hafsah Jamal, Nurhafizah Univ Teknol Mara Fac Comp & Math Sci Selangor Malaysia

ISBN: (纸本)9781614994343;9781614994336

Text steganography was never a threat until it has been manipulated by cyber criminals or terrorist for their own benefit. Secret messages sent through steganography with bad intent can cause harm and to the extent jeopardizing the security of a company or country. Thus, text steganalysis is critically needed for forensic investigation purposes due to the tremendous usage of digital media in accessing and disseminating information. Apparently, there has not been much research done on text steganalysis and mostly researches are based on statistical approach. The aim of the research is to propose a new text steganalysis technique in detecting format-based steganography using a simple and effective approach. This paper introduces a novel text steganalysis technique based on color-coded text visualization. An encoding scheme for the text visualization is designed by analyzing text features with respect to colors to detect whitespace pattern. The aim here is to distinguish between natural and stegano text by color-coded visualization. Experiments show that the detection performance accuracy successfully reaches 96.67% with remarkably high precision and recall. This finding has proved that the text visualization technique is capable in detecting text steganography effectively by simply looking at the text visualization image. It is evidently shown that a simple text steganalysis technique is successfully discovered and it is feasible.

关键词： Text visualization text steganalysis text steganography format-based method color coding

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Editing to Connected f-Degree Graph 33

Editing to Connected <i>f</i>-Degree Graph

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33rd Symposium on Theoretical Aspects of Computer Science (STACS)

作者： Fomin, Fedor V. Golovach, Petr Panolan, Fahad Saurabh, Saket Univ Bergen Dept Informat Bergen Norway Inst Math Sci Chennai Tamil Nadu India

ISBN: (纸本)9783959770019

In the EDGE EDITING TO CONNECTED f-DEGREE GRAPH problem we are given a graph G, an integer k and a function f assigning integers to vertices of G. The task is to decide whether there is a connected graph F on the same vertex set as G, such that for every vertex v, its degree in F is f(v) and the number of edges in E(G)Delta E(F), the symmetric difference of E(G) and E(F), is at most k. We show that EDGE EDITING TO CONNECTED f-DEGREE GRAPH is fixed-parameter tractable (FPT) by providing an algorithm solving the problem on an n-vertex graph in time 2(O)(k)(n)(O(1)). Our FPT algorithm is based on a non-trivial combination of colorcoding and fast computations of representative families over direct sum matroid of f-elongation of co-graphic matroid associated with G and uniform matroid over <(E(G))over bar>, the set of non-edges of G. We believe that this combination could be useful in designing parameterized algorithms for other edge editing problems.

关键词： Connected f-factor FPT Representative Family color coding

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Periodic long range proton conduction pathways in pseudo-cubic and orthorhombic perovskites

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SOLID STATE IONICS 2012年 213卷 8-13页

作者： Gomez, Maria A. Shepardson, Dylan Nguyen, Luong T. Kehinde, Tolu Mt Holyoke Coll Dept Chem S Hadley MA 01075 USA Mt Holyoke Coll Dept Math & Stat S Hadley MA 01075 USA

Dynamic programming is used to find periodic proton conduction paths in pseudo-cubic and orthorhombic perovskites. Periodic paths through a large periodic simulation box are compared to periodic paths through a smaller simulation box and pathways stitched from small simulation box periodic and aperiodic paths. For both size systems in the 900-1300 K temperature range, overall average limiting barriers over the N-step periodic pathways considered are 0.3, 0.4, and 0.6 eV for BaZr0.875Y0.125O3 , SrZr0.875Y0.125O3 and SrZr0.875-Al0.125O3, respectively, in good relative agreement with earlier experiments. However, differences in the ensemble weighted fraction of rotation, intraoctahedral transfer, and interoctahedral transfer limiting steps highlights differences in the small and large system periodic path ensembles. In contrast, the averages over the stitched ensemble are in excellent agreement with the large system averages. This suggests that a careful combining of small system pathways can yield pathways representative of a large system. (c) 2011 Elsevier B.V. All rights reserved.

关键词： Proton conduction Yttrium Dopant Perovskite color coding

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The Contribution of Adaptive Optics to Our Understanding of the Mechanisms of color Vision in Humans

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Neuroscience and Behavioral Physiology 2023年第6期53卷 1025-1035页

作者： Maximova, E.M. Kharkevich Institute of Information Transmission Problems Russian Academy of Sciences Moscow Russian Federation

We provide here a brief outline of data on color vision in animals and humans, along with the history and methods used in studying it. Results from basic research in this area obtained using adaptive optics and scanning laser ophthalmoscopy (AOSLO) in combination with densitometry, phase-sensitive optical coherence tomography (AO-PSOCT), and calcium imaging (Ca²⁺ imaging) are described. These methods provided the first in vivo evidence for the mosaic of cones in the human retina, allowing maps of the locations of cones of three different types (L, M, S) to be built and human color perception in response to stimulation of single cones to be investigated. © 2023, Springer Nature Switzerland AG.

关键词： adaptive optics color coding color vision dichromacy L cones M cones S cones

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Navigating through the noise: The effect of color-coded performance feedback on decision-making

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CONTEMPORARY ACCOUNTING RESEARCH 2024年第2期41卷 1031-1057页

作者： Cardinaels, Eddy Kramer, Stephan Maas, Victor S. Tilburg Univ Tilburg Sch Econ & Management Tilburg Netherlands Erasmus Univ Rotterdam Sch Management Rotterdam Netherlands Univ Amsterdam Amsterdam Business Sch Plantage Muidergracht 12 NL-1018 TV Amsterdam Netherlands

Many companies use color codes in their internal performance reports to highlight how current performance compares to performance in a previous period. We examine whether the use of color coding affects managers' decision-making in a resource allocation task. We argue that managers' decision accuracy will be lower if they receive noisier feedback, but that this detrimental effect of noise can be mitigated through color coding. Using two experiments, we find evidence consistent with our theory. Managers who receive reports in which performance increases are color-coded green and performance decreases are color-coded red are less affected by noise than managers who receive feedback reports without color coding. Supplemental analyses suggest that color coding induces managers to process feedback in a more holistic manner, which reduces the adverse effect of noise on managers' learning processes. Our findings have several important implications for research and practice. Remedier au manque de precision : la retroaction sur la performance par codes de couleur et son effet sur la prise de decisionDe nombreuses entreprises utilisent des codes de couleur dans leurs rapports de performance internes pour comparer la performance actuelle et la performance d'une periode anterieure. Les auteurs examinent si l'utilisation de codes de couleur influence la prise de decision chez les gestionnaires lors d'une tache liee a l'allocation de ressources. Ils soutiennent que la justesse des decisions des gestionnaires est moins grande si le niveau de precision de la retroaction est plus faible, mais que cet effet defavorable peut etre attenue par l'utilisation de codes de couleur. A l'aide de deux experiences, les auteurs trouvent des donnees qui concordent avec leur theorie. Les gestionnaires qui recoivent des rapports dans lesquels les ameliorations de performance sont codees en vert et les baisses de performance en rouge sont moins influences par le manque de precision que les gestionna

关键词： color coding feedback learning noise performance measurement apprentissage code de couleur manque de precision mesure de performance retroaction

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Graph Model to Represent color Closeness in Pseudo-color Multimodal MRI 36

Graph Model to Represent Color Closeness in Pseudo-color Mul...

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36th IEEE International Symposium on Computer-Based Medical Systems (CBMS)

作者： Pio, Alessandro Castellano, Giovanna Mignosi, Filippo Placidi, Giuseppe Polsinelli, Matteo Sciarra, Alessandro Vessio, Gennaro Univ LAquila A2VI Lab Dept MeSVA Laquila Italy Univ Bari Aldo Moro Dept Comp Sci Bari Italy Univ LAquila DISIM Laquila Italy Univ Salerno Dept Comp Sci Salerno Italy

ISBN: (纸本)9798350312249

In medical imaging and magnetic resonance imaging (MRI), images generally represent the interaction between electromagnetic waves and the human body, often provided in multiple modalities, each represented in gray scale. However, the analysis and interpretation of these images mainly occur sequentially or, as in the case of automated tools, as a concatenation of independent sources of information. The nonlinear relationships between them are not exploited or left to the learning process of a complex automated strategy. In contrast, combining multiple modalities into pseudo-color images could enable the exploitation of nonlinear relationships due to color perception and color contrast, which play a crucial role in human vision to recognize objects effectively and efficiently. In principle, this can be extended to automated systems. However, automatic strategies do not fully exploit color representation if these nonlinear relationships are not modeled. In this paper, we show how a graph model of a device-independent color encoding (CIE XYZ) supplemented with a metric in the form of Euclidean distance between colors can become an effective tool for image segmentation from multiple sources. Tests were conducted on multimodal brain MRIs collected in a public database. The results demonstrate the importance of a graph model for mimicking color relationships, which could be very useful in medical image analysis and interpretation and other color-based computer vision applications.

关键词： artificial intelligence color coding computer vision medical imaging MRI multimodal imaging

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CDFM-based Secure & Efficient Architecture for Data Management in Cloud Computing 2

CDFM-based Secure & Efficient Architecture for Data Manageme...

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2nd International Conference on Intelligent Communication and Computational Techniques (ICCT)

作者： Singh, Muskaan Kumar, Ravinder Chana, Inderveer Thapar Inst Engn & Technol TIET Patiala Punjab India

ISBN: (纸本)9781728117119

Cloud has become a prominent technology of data storage and computation. This allows user and institutions to depend on Cloud providers for storage and computing to offer system as a service. The growing significance of extensive acquisition and adoption of cloud computing have imposed security assurance on cloud. Security assurance provides integrity, confidentiality and reliability of data by performing computation and retrieving in compliance with the cloud providers. The storage, processing and managing of data for complex application becomes cumbersome and burdensome on cloud provider platforms. A management mechanism is required to manage the resources and reduce the complexity for maximizing performance with minimum human intervention. Even handling security threats occurring with varying workloads and failures in cloud environment is entailed. Motivated from this self management mechanism, we proposed a novel Cuckoo-based Data Fragmentation and Metadata (CDFM) secure and efficient approach. It manages the complex data of Translation and retrieves the translated data securely. In this work, cuckoo pools divide the data into different number of fragments and send it to different data pools. Data pools first encrypt the data fragment and assign color code to this encrypted fragment and then prepare indexing according to this color coding. The performance analysis, exhibit higher performance than existing approach for security and data fragmentation in cloud scenario.

关键词： Cloud MTS Cuckoo Data Management Encryption Fragmentation Metadata color coding

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Foot Plantar Pressure Measurement System Using Optical Sensor 9

Foot Plantar Pressure Measurement System Using Optical Senso...

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9th Biomedical Engineering International Conference (BMEiCON)

作者： Keatsamarn, Tanapon Pintavirooj, Chuchart King Mongkuts Inst Technol Ladkrabang Fac Engn Biomed Engn Program Bangkok Thailand

ISBN: (纸本)9781509039401

Foot pressure measurement is necessary for classifying disorders of the foot and designing insole for individual person. This present work uses optical sensor (webcam) to capture the foot-pressure image. Image processing on Raspberry Pi with OpenCV library is applied to process image and color coding corresponding to foot pressure. The hardware system uses the transparent acrylic plate and uses the steel as a base of the acrylic plate. The glossy white paper is placed on the top of the transparent acrylic plate covering with polypropylene sheet on the system to block light from outside. Light in the system is released from LED strip entering from a side of the acrylic plate. The scattered light occurred in acrylic plate from the foot pressing were recorded by the webcams. The four webcams placed below facing upward for collecting images (2 cameras for each foot) and sending to Raspberry Pi. Raspberry Pi will perform image process including image enhancement and image stitching and image displaying. The result can be used to classifying foot type and find methods to prevent the occurrence of for disorders.

关键词： Foot Pressure Diabetic Patient Image Processing color coding

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