Computers & Graphics-Uk最新文献_第2页

Controlling the scatterplot shapes of 2D and 3D multidimensional projections 控制二维和三维多维投影的散点图形状

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-24 DOI: 10.1016/j.cag.2024.104093

引用次数: 0

Executing realistic earthquake simulations in unreal engine with material calibration 通过材料校准在虚幻引擎中执行逼真的地震模拟

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-24 DOI: 10.1016/j.cag.2024.104091

{"title":"Executing realistic earthquake simulations in unreal engine with material calibration","authors":"","doi":"10.1016/j.cag.2024.104091","DOIUrl":"10.1016/j.cag.2024.104091","url":null,"abstract":"<div><div>Earthquakes significantly impact societies and economies, underscoring the need for effective search and rescue strategies. As AI and robotics increasingly support these efforts, the demand for high-fidelity, real-time simulation environments for training has become pressing. Earthquake simulation can be considered as a complex system. Traditional simulation methods, which primarily focus on computing intricate factors for single buildings or simplified architectural agglomerations, often fall short in providing realistic visuals and real-time structural damage assessments for urban environments. To address this deficiency, we introduce a real-time, high visual fidelity earthquake simulation platform based on the Chaos Physics System in Unreal Engine, specifically designed to simulate the damage to urban buildings. Initially, we use a genetic algorithm to calibrate material simulation parameters from Ansys into the Unreal Engine’s fracture system, based on real-world test standards. This alignment ensures the similarity of results between the two systems while achieving real-time capabilities. Additionally, by integrating real earthquake waveform data, we improve the simulation’s authenticity, ensuring it accurately reflects historical events. All functionalities are integrated into a visual user interface, enabling zero-code operation, which facilitates testing and further development by cross-disciplinary users. We verify the platform’s effectiveness through three AI-based tasks: similarity detection, path planning, and image segmentation. This paper builds upon the preliminary earthquake simulation study we presented at IMET 2023, with significant enhancements, including improvements to the material calibration workflow and the method for binding building foundations.</div></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ten years of immersive education: Overview of a Virtual and Augmented Reality course at postgraduate level 沉浸式教育十年：研究生虚拟和增强现实课程概览

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-20 DOI: 10.1016/j.cag.2024.104088

{"title":"Ten years of immersive education: Overview of a Virtual and Augmented Reality course at postgraduate level","authors":"","doi":"10.1016/j.cag.2024.104088","DOIUrl":"10.1016/j.cag.2024.104088","url":null,"abstract":"<div><div>In recent years, the market has seen the emergence of numerous affordable sensors, interaction devices, and displays, which have greatly facilitated the adoption of Virtual and Augmented Reality (VR/AR) across various applications. However, developing these applications requires a solid understanding of the field and specific technical skills, which are often lacking in current Computer Science and Engineering education programs. This work details an extended version from a Eurographics 2024 Education Paper, reporting a post-graduate-level course that has been taught for the past ten years to almost 200 students, across several Master’s programs. The course introduces students to the fundamental principles, methods, and tools of VR/AR. Its primary objective is to equip students with the knowledge necessary to understand, create, implement, and evaluate applications using these technologies. The paper provides insights into the course structure, key topics covered, assessment methods, as well as the devices and infrastructure utilized. It also includes an overview of various practical projects completed over the years. Among other reflections, we discuss the challenges of teaching this course, particularly due to the rapid evolution of the field, which necessitates constant updates to the curriculum. Finally, future perspectives for the course are outlined.</div></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0097849324002231/pdfft?md5=f05085791d28d06cef00928e6ebd0b31&pid=1-s2.0-S0097849324002231-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient image generation with Contour Wavelet Diffusion 利用轮廓小波扩散生成高效图像

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-20 DOI: 10.1016/j.cag.2024.104087

{"title":"Efficient image generation with Contour Wavelet Diffusion","authors":"","doi":"10.1016/j.cag.2024.104087","DOIUrl":"10.1016/j.cag.2024.104087","url":null,"abstract":"<div><div>The burgeoning field of image generation has captivated academia and industry with its potential to produce high-quality images, facilitating applications like text-to-image conversion, image translation, and recovery. These advancements have notably propelled the growth of the metaverse, where virtual environments constructed from generated images offer new interactive experiences, especially in conjunction with digital libraries. The technology creates detailed high-quality images, enabling immersive experiences. Despite diffusion models showing promise with superior image quality and mode coverage over GANs, their slow training and inference speeds have hindered broader adoption. To counter this, we introduce the Contour Wavelet Diffusion Model, which accelerates the process by decomposing features and employing multi-directional, anisotropic analysis. This model integrates an attention mechanism to focus on high-frequency details and a reconstruction loss function to ensure image consistency and accelerate convergence. The result is a significant reduction in training and inference times without sacrificing image quality, making diffusion models viable for large-scale applications and enhancing their practicality in the evolving digital landscape.</div></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supporting motion-capture acting with collaborative Mixed Reality 利用协作式混合现实支持动作捕捉表演

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-19 DOI: 10.1016/j.cag.2024.104090

{"title":"Supporting motion-capture acting with collaborative Mixed Reality","authors":"","doi":"10.1016/j.cag.2024.104090","DOIUrl":"10.1016/j.cag.2024.104090","url":null,"abstract":"<div><div>Technologies such as chroma-key, LED walls, motion capture (mocap), 3D visual storyboards, and simulcams are revolutionizing how films featuring visual effects are produced. Despite their popularity, these technologies have introduced new challenges for actors. An increased workload is faced when digital characters are animated via mocap, since actors are requested to use their imagination to envision what characters see and do on set. This work investigates how Mixed Reality (MR) technology can support actors during mocap sessions by presenting a collaborative MR system named CoMR-MoCap, which allows actors to rehearse scenes by overlaying digital contents onto the real set. Using a Video See-Through Head Mounted Display (VST-HMD), actors can see digital representations of performers in mocap suits and digital scene contents in real time. The system supports collaboration, enabling multiple actors to wear both mocap suits to animate digital characters and VST-HMDs to visualize the digital contents. A user study involving 24 participants compared CoMR-MoCap to the traditional method using physical props and visual cues. The results showed that CoMR-MoCap significantly improved actors’ ability to position themselves and direct their gaze, and it offered advantages in terms of usability, spatial and social presence, embodiment, and perceived effectiveness over the traditional method.</div></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LightingFormer: Transformer-CNN hybrid network for low-light image enhancement LightingFormer：用于弱光图像增强的变换器-CNN 混合网络

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-18 DOI: 10.1016/j.cag.2024.104089

{"title":"LightingFormer: Transformer-CNN hybrid network for low-light image enhancement","authors":"","doi":"10.1016/j.cag.2024.104089","DOIUrl":"10.1016/j.cag.2024.104089","url":null,"abstract":"<div><div>Recent deep-learning methods have shown promising results in low-light image enhancement. However, current methods often suffer from noise and artifacts, and most are based on convolutional neural networks, which have limitations in capturing long-range dependencies resulting in insufficient recovery of extremely dark parts in low-light images. To tackle these issues, this paper proposes a novel Transformer-based low-light image enhancement network called LightingFormer. Specifically, we propose a novel Transformer-CNN hybrid block that captures global and local information via mixed attention. It combines the advantages of the Transformer in capturing long-range dependencies and the advantages of CNNs in extracting low-level features and enhancing locality to recover extremely dark parts and enhance local details in low-light images. Moreover, we adopt the U-Net discriminator to enhance different regions in low-light images adaptively, avoiding overexposure or underexposure, and suppressing noise and artifacts. Extensive experiments show that our method outperforms the state-of-the-art methods quantitatively and qualitatively. Furthermore, the application to object detection demonstrates the potential of our method in high-level vision tasks.</div></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

APE-GAN: A colorization method for focal areas of infrared images guided by an improved attention mask mechanism APE-GAN：以改进的注意力掩码机制为指导的红外图像焦点区域着色方法

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-18 DOI: 10.1016/j.cag.2024.104086

{"title":"APE-GAN: A colorization method for focal areas of infrared images guided by an improved attention mask mechanism","authors":"","doi":"10.1016/j.cag.2024.104086","DOIUrl":"10.1016/j.cag.2024.104086","url":null,"abstract":"<div><div>Due to their minimal susceptibility to environmental changes, infrared images are widely applicable across various fields, particularly in the realm of traffic. Nonetheless, a common drawback of infrared images lies in their limited chroma and detail information, posing challenges for clear information retrieval. While extensive research has been conducted on colorizing infrared images in recent years, existing methods primarily focus on overall translation without adequately addressing the foreground area containing crucial details. To address this issue, we propose a novel approach that distinguishes and colors the foreground content with important information and the background content with less significant details separately before fusing them into a colored image. Consequently, we introduce an enhanced generative adversarial network based on Attention mask to meticulously translate the foreground content containing vital information more comprehensively. Furthermore, we have carefully designed a new composite loss function to optimize high-level detail generation and improve image colorization at a finer granularity. Detailed testing on IRVI datasets validates the effectiveness of our proposed method in solving the problem of infrared image coloring.</div></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ST2SI: Image Style Transfer via Vision Transformer using Spatial Interaction ST2SI：通过视觉转换器利用空间交互进行图像风格转换

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-16 DOI: 10.1016/j.cag.2024.104084

引用次数: 0

Editorial Note Computers & Graphics Issue 123 编者按《计算机与图形》第 123 期

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-13 DOI: 10.1016/j.cag.2024.104072

引用次数: 0

GIC-Flow: Appearance flow estimation via global information correlation for virtual try-on under large deformation GIC-Flow：通过大变形下虚拟试穿的全局信息相关性进行外观流估计

IF 2.5 4区计算机科学

Computers & Graphics-Uk Pub Date : 2024-09-12 DOI: 10.1016/j.cag.2024.104071

{"title":"GIC-Flow: Appearance flow estimation via global information correlation for virtual try-on under large deformation","authors":"","doi":"10.1016/j.cag.2024.104071","DOIUrl":"10.1016/j.cag.2024.104071","url":null,"abstract":"<div><p>The primary aim of image-based virtual try-on is to seamlessly deform the target garment image to align with the human body. Owing to the inherent non-rigid nature of garments, current methods prioritise flexible deformation through appearance flow with high degrees of freedom. However, existing appearance flow estimation methods solely focus on the correlation of local feature information. While this strategy successfully avoids the extensive computational effort associated with the direct computation of the global information correlation of feature maps, it leads to challenges in garments adapting to large deformation scenarios. To overcome these limitations, we propose the GIC-Flow framework, which obtains appearance flow by calculating the global information correlation while reducing computational regression. Specifically, our proposed global streak information matching module is designed to decompose the appearance flow into horizontal and vertical vectors, effectively propagating global information in both directions. This innovative approach considerably diminishes computational requirements, contributing to an enhanced and efficient process. In addition, to ensure the accurate deformation of local texture in garments, we propose the local aggregate information matching module to aggregate information from the nearest neighbours before computing the global correlation and to enhance weak semantic information. Comprehensive experiments conducted using our method on the VITON and VITON-HD datasets show that GIC-Flow outperforms existing state-of-the-art algorithms, particularly in cases involving complex garment deformation.</p></div>","PeriodicalId":50628,"journal":{"name":"Computers & Graphics-Uk","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0