ACM SIGGRAPH 2003 Papers最新文献_第3页

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882279

Peter-Pike J. Sloan, Xinguo Liu, H. Shum, John M. Snyder

{"title":"Bi-scale radiance transfer","authors":"Peter-Pike J. Sloan, Xinguo Liu, H. Shum, John M. Snyder","doi":"10.1145/1201775.882279","DOIUrl":"https://doi.org/10.1145/1201775.882279","url":null,"abstract":"Radiance transfer represents how generic source lighting is shadowed and scattered by an object to produce view-dependent appearance. We generalize by rendering transfer at two scales. A macro-scale is coarsely sampled over an object's surface, providing global effects like shadows cast from an arm onto a body. A meso-scale is finely sampled over a small patch to provide local texture. Low-order (25D) spherical harmonics represent low-frequency lighting dependence for both scales. To render, a coefficient vector representing distant source lighting is first transformed at the macro-scale by a matrix at each vertex of a coarse mesh. The resulting vectors represent a spatially-varying hemisphere of lighting incident to the meso-scale. A 4D function, called a radiance transfer texture (RTT), then specifies the surface's meso-scale response to each lighting basis component, as a function of a spatial index and a view direction. Finally, a 25D dot product of the macro-scale result vector with the vector looked up from the RTT performs the correct shading integral. We use an id map to place RTT samples from a small patch over the entire object; only two scalars are specified at high spatial resolution. Results show that bi-scale decomposition makes preprocessing practical and efficiently renders self-shadowing and interreflection effects from dynamic, low-frequency light sources at both scales.","PeriodicalId":314969,"journal":{"name":"ACM SIGGRAPH 2003 Papers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126721506","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: 83

Keyframe control of smoke simulations 烟雾模拟的关键帧控制

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882337

Adrien Treuille, A. McNamara, Zoran Popovic, J. Stam

引用次数: 308

Accurate light source acquisition and rendering 准确的光源采集和渲染

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882316

M. Goesele, Xavier Granier, W. Heidrich, H. Seidel

引用次数: 65

Image-based skin color and texture analysis/synthesis by extracting hemoglobin and melanin information in the skin 基于图像的皮肤颜色和纹理分析/合成，提取皮肤中的血红蛋白和黑色素信息

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882344

N. Tsumura, Nobutoshi Ojima, Kayoko Sato, M. Shiraishi, Hideto Shimizu, Hirohide Nabeshima, S. Akazaki, K. Hori, Y. Miyake

{"title":"Image-based skin color and texture analysis/synthesis by extracting hemoglobin and melanin information in the skin","authors":"N. Tsumura, Nobutoshi Ojima, Kayoko Sato, M. Shiraishi, Hideto Shimizu, Hirohide Nabeshima, S. Akazaki, K. Hori, Y. Miyake","doi":"10.1145/1201775.882344","DOIUrl":"https://doi.org/10.1145/1201775.882344","url":null,"abstract":"This paper proposes an E-cosmetic function for digital images based on physics and physiologically-based image processing. A practical skin color and texture analysis/synthesis technique is introduced for this E-cosmetic function. Shading on the face is removed by a simple color vector analysis in the optical density domain as an inverse lighting technique. The image without shading is analyzed by a previously introduced technique that extracts hemoglobin and melanin components by independent component analysis. Experimental results using UV-B irradiation and the application of methyl nicotinate on the arms support the physiological validity of the analysis and the effectiveness of the proposed shading removal. We synthesized the way facial images changed due to tanning or alcohol consumption, and compared the synthesized images with images of actual changes in skin color. The comparison shows an excellent match between the synthesized and actual images of changes due to tanning and alcohol consumption. We also proposed a technique to synthesize the change of texture in pigment due to aging or the application of cosmetics. The pyramid-based texture analysis/synthesis technique was used for the spatial processing of texture. Using the proposed technique, we could realistically change the skin color and texture of a 50 year-old woman to that of a 20 year-old woman.","PeriodicalId":314969,"journal":{"name":"ACM SIGGRAPH 2003 Papers","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121431266","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: 322

Clothing manipulation 服装操作

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882328

T. Igarashi, J. Hughes

引用次数: 72

Graphics for the masses: a hardware rasterization architecture for mobile phones 面向大众的图形:用于移动电话的硬件栅格化架构

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882348

T. Akenine-Möller, Jacob Ström

{"title":"Graphics for the masses: a hardware rasterization architecture for mobile phones","authors":"T. Akenine-Möller, Jacob Ström","doi":"10.1145/1201775.882348","DOIUrl":"https://doi.org/10.1145/1201775.882348","url":null,"abstract":"The mobile phone is one of the most widespread devices with rendering capabilities. Those capabilities have been very limited because the resources on such devices are extremely scarce; small amounts of memory, little bandwidth, little chip area dedicated for special purposes, and limited power consumption. The small display resolutions present a further challenge; the angle subtended by a pixel is relatively large, and therefore reasonably high quality rendering is needed to generate high fidelity images.To increase the mobile rendering capabilities, we propose a new hardware architecture for rasterizing textured triangles. Our architecture focuses on saving memory bandwidth, since an external memory access typically is one of the most energy-consuming operations, and because mobile phones need to use as little power as possible. Therefore, our system includes three new key innovations: I) an inexpensive multisampling scheme that gives relatively high quality at the same cost of previous inexpensive schemes, II) a texture minification system, including texture compression, which gives quality relatively close to trilinear mipmapping at the cost of 1.33 32-bit memory accesses on average, III) a scanline-based culling scheme that avoids a significant amount of z-buffer reads, and that only requires one context. Software simulations show that these three innovations together significantly reduce the memory bandwidth, and thus also the power consumption.","PeriodicalId":314969,"journal":{"name":"ACM SIGGRAPH 2003 Papers","volume":"54 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132575536","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: 147

Shape modeling with point-sampled geometry 形状建模与点采样几何

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882319

M. Pauly, Richard Keiser, L. Kobbelt, M. Gross

引用次数: 524

Multi-level partition of unity implicits 统一隐含的多层次划分

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882293

Y. Ohtake, A. Belyaev, M. Alexa, Greg Turk, H. Seidel

引用次数: 235

Synthesis of progressively-variant textures on arbitrary surfaces 任意表面上渐变纹理的合成

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882266

Jingdan Zhang, Kun Zhou, L. Velho, B. Guo, H. Shum

{"title":"Synthesis of progressively-variant textures on arbitrary surfaces","authors":"Jingdan Zhang, Kun Zhou, L. Velho, B. Guo, H. Shum","doi":"10.1145/1201775.882266","DOIUrl":"https://doi.org/10.1145/1201775.882266","url":null,"abstract":"We present an approach for decorating surfaces with progressively-variant textures. Unlike a homogeneous texture, a progressively-variant texture can model local texture variations, including the scale, orientation, color, and shape variations of texture elements. We describe techniques for modeling progressively-variant textures in 2D as well as for synthesizing them over surfaces. For 2D texture modeling, our feature-based warping technique allows the user to control the shape variations of texture elements, making it possible to capture complex texture variations such as those seen in animal coat patterns. In addition, our feature-based blending technique can create a smooth transition between two given homogeneous textures, with progressive changes of both shapes and colors of texture elements. For synthesizing textures over surfaces, the biggest challenge is that the synthesized texture elements tend to break apart as they progressively vary. To address this issue, we propose an algorithm based on texton masks, which mark most prominent texture elements in the 2D texture sample. By leveraging the power of texton masks, our algorithm can maintain the integrity of the synthesized texture elements on the target surface.","PeriodicalId":314969,"journal":{"name":"ACM SIGGRAPH 2003 Papers","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130020023","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: 224

Delay streams for graphics hardware 用于图形硬件的延迟流

ACM SIGGRAPH 2003 Papers Pub Date : 2003-07-01 DOI: 10.1145/1201775.882347

Timo Aila, Ville Miettinen, P. Nordlund

引用次数: 80