Proceedings of the ACM on computer graphics and interactive techniques最新文献_第5页

Importance-Based Ray Strategies for Dynamic Diffuse Global Illumination 基于重要性的动态漫射全局照明光线策略

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-12 DOI: 10.1145/3585500

Zihao Liu, Jing Huang, Allan Rocha, Jim Malmros, Jerry Zhang

引用次数: 0

Fast Position-based Multi-Agent Group Dynamics 快速基于位置的多智能体群体动力学

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-12 DOI: 10.1145/3585507

Tomer Weiss

引用次数: 1

Efficient Spatial Resampling Using the PDF Similarity 利用PDF相似性的高效空间重采样

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-12 DOI: 10.1145/3585501

Yusuke Tokuyoshi

{"title":"Efficient Spatial Resampling Using the PDF Similarity","authors":"Yusuke Tokuyoshi","doi":"10.1145/3585501","DOIUrl":"https://doi.org/10.1145/3585501","url":null,"abstract":"In real-time rendering, spatiotemporal reservoir resampling (ReSTIR) is a powerful technique to increase the number of candidate samples for resampled importance sampling. However, reusing spatiotemporal samples is not always efficient when target PDFs for the reused samples are dissimilar to the integrand. Target PDFs are often spatially different for highly detailed scenes due to geometry edges, normal maps, spatially varying materials, and shadow edges. This paper introduces a new method of rejecting spatial reuse based on the similarity of PDF shapes for single-bounce path connections (e.g., direct illumination). While existing rejection methods for ReSTIR do not support arbitrary materials and shadow edges, our PDF similarity takes them into account because target PDFs include BSDFs and shadows. In this paper, we present a rough estimation of PDF shapes using von Mises--Fisher distributions and temporal resampling. We also present a stable combination of our rejection method and the existing rejection method, considering estimation errors due to temporal disocclusions and moving light sources. This combination efficiently reduces the error around shadow edges with temporal continuities. By using our method for a ReSTIR variant that reuses shadow ray visibility for the integrand, we can reduce the number of shadow rays while preserving shadow edges.","PeriodicalId":74536,"journal":{"name":"Proceedings of the ACM on computer graphics and interactive techniques","volume":" ","pages":"1 - 19"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42827471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Subspace Culling for Ray-Box Intersection 光线盒相交的子空间消隐

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-12 DOI: 10.1145/3585503

A. Yoshimura, T. Harada

{"title":"Subspace Culling for Ray-Box Intersection","authors":"A. Yoshimura, T. Harada","doi":"10.1145/3585503","DOIUrl":"https://doi.org/10.1145/3585503","url":null,"abstract":"Ray tracing is an essential operation for realistic image synthesis. The acceleration of ray tracing has been studied for a long period of time because algorithms such as light transport simulations require a large amount of ray tracing. One of the major approaches to accelerate the intersections is to use bounding volumes for early pruning for primitives in the volume. The axis-aligned bounding box is a popular bounding volume for ray tracing because of its simplicity and efficiency. However, the conservative bounding volume may produce extra empty space in addition to its content. Especially, primitives that are thin and diagonal to the axis give false-positive hits on the box volume due to the extra space. Although more complex bounding volumes such as oriented bounding boxes may reduce more false-positive hits, they are computationally expensive. In this paper, we propose a novel culling approach to reduce false-positive hits for the bounding box by embedding a binary voxel data structure to the volume. As a ray is represented as a conservative voxel volume as well in our approach, the ray--voxel intersection is cheaply done by bitwise AND operations. Our method is applicable to hierarchical data structures such as bounding volume hierarchy (BVH). It reduces false-positive hits due to the ray--box test and reduces the number of intersections during the traversal of BVH in ray tracing. We evaluate the reduction of intersections with several scenes and show the possibility of performance improvement despite the culling overhead. We also introduce a compression approach with a lookup table for our voxel data. We show that our compressed voxel data achieves significant false-positive reductions with a small amount of memory.","PeriodicalId":74536,"journal":{"name":"Proceedings of the ACM on computer graphics and interactive techniques","volume":" ","pages":"1 - 15"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49637869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-Time Sand Dune Simulation 实时沙丘模拟

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-12 DOI: 10.1145/3585510

B. Taylor, J. Keyser

引用次数: 0

G2 Blending Ball B-Spline Curve by B-Spline G2用B样条混合球B样条曲线

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-12 DOI: 10.1145/3585504

Yuming Zhao, Zhongke Wu, Xingce Wang, Xinyu Liu

引用次数: 0

ManiLoco: A VR-Based Locomotion Method for Concurrent Object Manipulation. ManiLoco:一种基于vr的并发对象操作的运动方法。

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-05-01 DOI: 10.1145/3585502

Dayu Wan, Xiaolei Guo, Jiahui Dong, Christos Mousas, Yingjie Chen

{"title":"ManiLoco: A VR-Based Locomotion Method for Concurrent Object Manipulation.","authors":"Dayu Wan, Xiaolei Guo, Jiahui Dong, Christos Mousas, Yingjie Chen","doi":"10.1145/3585502","DOIUrl":"https://doi.org/10.1145/3585502","url":null,"abstract":"<p><p>The use of virtual reality (VR) in laboratory skill training is rapidly increasing. In such applications, users often need to explore a large virtual environment within a limited physical space while completing a series of hand-based tasks (e.g., object manipulation). However, the most widely used controller-based teleport methods may conflict with the users' hand operation and result in a higher cognitive load, negatively affecting their training experiences. To alleviate these limitations, we designed and implemented a locomotion method called ManiLoco to enable hands-free interaction and thus avoid conflicts and interruptions from other tasks. Users can teleport to a remote object's position by taking a step toward the object while looking at it. We evaluated ManiLoco and compared it with state-of-the-art Point & Teleport in a within-subject experiment with 16 participants. The results confirmed the viability of our foot- and head-based approach and better support concurrent object manipulation in VR training tasks. Furthermore, our locomotion method does not require any additional hardware. It solely relies on the VR head-mounted display (HMD) and our implementation of detecting the user's stepping activity, and it can be easily applied to any VR application as a plugin.</p>","PeriodicalId":74536,"journal":{"name":"Proceedings of the ACM on computer graphics and interactive techniques","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10249678/pdf/nihms-1905180.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9619785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pixel-wise Guidance for Utilizing Auxiliary Features in Monte Carlo Denoising 蒙特卡罗去噪中辅助特征利用的逐像素指导

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-04-11 DOI: 10.1145/3585505

Kyu Beom Han, Olivia G. Odenthal, Woo Jae Kim, S.-E. Yoon

{"title":"Pixel-wise Guidance for Utilizing Auxiliary Features in Monte Carlo Denoising","authors":"Kyu Beom Han, Olivia G. Odenthal, Woo Jae Kim, S.-E. Yoon","doi":"10.1145/3585505","DOIUrl":"https://doi.org/10.1145/3585505","url":null,"abstract":"Auxiliary features such as geometric buffers (G-buffers) and path descriptors (P-buffers) have been shown to significantly improve Monte Carlo (MC) denoising. However, recent approaches implicitly learn to exploit auxiliary features for denoising, which could lead to insufficient utilization of each type of auxiliary features. To overcome such an issue, we propose a denoising framework that relies on an explicit pixel-wise guidance for utilizing auxiliary features. First, we train two denoisers, each trained by a different auxiliary feature (i.e., G-buffers or P-buffers). Then we design our ensembling network to obtain per-pixel ensembling weight maps, which represent pixel-wise guidance for which auxiliary feature should be dominant at reconstructing each individual pixel and use them to ensemble the two denoised results of our denosiers. We also propagate our pixel-wise guidance to the denoisers by jointly training the denoisers and the ensembling network, further guiding the denoisers to focus on regions where G-buffers or P-buffers are relatively important for denoising. Our result and show considerable improvement in denoising performance compared to the baseline denoising model using both G-buffers and P-buffers. The source code is available at https://github.com/qbhan/GuidanceMCDenoising.","PeriodicalId":74536,"journal":{"name":"Proceedings of the ACM on computer graphics and interactive techniques","volume":"6 1","pages":"1 - 19"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42627915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DiffXPBD DiffXPBD

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-01-04 DOI: 10.1145/3606923

Tuur Stuyck, Hsiao-yu Chen

{"title":"DiffXPBD","authors":"Tuur Stuyck, Hsiao-yu Chen","doi":"10.1145/3606923","DOIUrl":"https://doi.org/10.1145/3606923","url":null,"abstract":"We present DiffXPBD, a novel and efficient analytical formulation for the differentiable position-based simulation of compliant constrained dynamics (XPBD). Our proposed method allows computation of gradients of numerous parameters with respect to a goal function simultaneously leveraging a performant simulation model. The method is efficient, thus enabling differentiable simulations of high resolution geometries and degrees of freedom (DoFs). Collisions are naturally included in the framework. Our differentiable model allows a user to easily add additional optimization variables. Every control variable gradient requires the computation of only a few partial derivatives which can be computed using automatic differentiation code. We demonstrate the efficacy of the method with examples such as elastic cloth and volumetric material parameter estimation, initial value optimization, optimizing for underlying body shape and pose by only observing the clothing, and optimizing a time-varying external force sequence to match sparse keyframe shapes at specific times. Our approach demonstrates excellent efficiency and we demonstrate this on high resolution meshes with optimizations involving over 26 million degrees of freedom. Making an existing solver differentiable requires only a few modifications and the model is compatible with both modern CPU and GPU multi-core hardware.","PeriodicalId":74536,"journal":{"name":"Proceedings of the ACM on computer graphics and interactive techniques","volume":"6 1","pages":"1 - 14"},"PeriodicalIF":0.0,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48974283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NeRFshop: Interactive Editing of Neural Radiance Fields NeRFshop:神经辐射场的交互式编辑

Proceedings of the ACM on computer graphics and interactive techniques Pub Date : 2023-01-01 DOI: 10.1145/3585499

Clément Jambon, B. Kerbl, Georgios Kopanas, Stavros Diolatzis, Thomas Leimkühler, G. Drettakis

{"title":"NeRFshop: Interactive Editing of Neural Radiance Fields","authors":"Clément Jambon, B. Kerbl, Georgios Kopanas, Stavros Diolatzis, Thomas Leimkühler, G. Drettakis","doi":"10.1145/3585499","DOIUrl":"https://doi.org/10.1145/3585499","url":null,"abstract":"Neural Radiance Fields (NeRFs) have revolutionized novel view synthesis for captured scenes, with recent methods allowing interactive free-viewpoint navigation and fast training for scene reconstruction. However, the implicit representations used by these methods—often including neural networks and complex encodings— make them difficult to edit. Some initial methods have been proposed, but they suffer from limited editing capabilities and/or from a lack of interactivity, and are thus unsuitable for interactive editing of captured scenes. We tackle both limitations and introduce NeRFshop, a novel end-to-end method that allows users to interactively select and deform objects through cage-based transformations. NeRFshop provides fine scribble-based user control for the selection of regions or objects to edit, semi-automatic cage creation, and interactive volumetric manipulation of scene content thanks to our GPU-friendly two-level interpolation scheme. Further, we introduce a preliminary approach that reduces potential resulting artifacts of these transformations with a volumetric membrane interpolation technique inspired by Poisson image editing and provide a process that “distills” the edits into a standalone NeRF representation.","PeriodicalId":74536,"journal":{"name":"Proceedings of the ACM on computer graphics and interactive techniques","volume":"6 1","pages":"1:1-1:21"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64067887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19