Acquisition and Modeling of Material Appearance - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Acquisition and Modeling of Material Appearance write by Wai Kit Addy Ngan. This book was released on 2006. Acquisition and Modeling of Material Appearance available in PDF, EPUB and Kindle. (Cont.) We also propose a new method that significantly reduces measurement cost and time of the bidirectional texture function (BTF) through a statistical characterization of texture appearance. Our reconstruction method combines naturally aligned images and alignment-insensitive statistics to produce visually plausible results. We demonstrate our acquisition system which is able to capture intricate materials like fabrics in less than ten minutes with commodity equipments. In addition, we present a method to facilitate effective user design in the space of material appearance. We introduce a metric in the space of reflectance which corresponds roughly to perceptual measures. The main idea of our approach is to evaluate reflectance differences in terms of their induced rendered images, instead of the reflectance function itself defined in the angular domains. With rendered images, we show that even a simple computational metric can provide good perceptual spacing and enable intuitive navigation of the reflectance space.
Material Appearance Modeling: A Data-Coherent Approach
Material Appearance Modeling: A Data-Coherent Approach - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Material Appearance Modeling: A Data-Coherent Approach write by Yue Dong. This book was released on 2013-06-03. Material Appearance Modeling: A Data-Coherent Approach available in PDF, EPUB and Kindle. A principal aim of computer graphics is to generate images that look as real as photographs. Realistic computer graphics imagery has however proven to be quite challenging to produce, since the appearance of materials arises from complicated physical processes that are difficult to analytically model and simulate, and image-based modeling of real material samples is often impractical due to the high-dimensional space of appearance data that needs to be acquired. This book presents a general framework based on the inherent coherency in the appearance data of materials to make image-based appearance modeling more tractable. We observe that this coherence manifests itself as low-dimensional structure in the appearance data, and by identifying this structure we can take advantage of it to simplify the major processes in the appearance modeling pipeline. This framework consists of two key components, namely the coherence structure and the accompanying reconstruction method to fully recover the low-dimensional appearance data from sparse measurements. Our investigation of appearance coherency has led to three major forms of low-dimensional coherence structure and three types of coherency-based reconstruction upon which our framework is built. This coherence-based approach can be comprehensively applied to all the major elements of image-based appearance modeling, from data acquisition of real material samples to user-assisted modeling from a photograph, from synthesis of volumes to editing of material properties, and from efficient rendering algorithms to physical fabrication of objects. In this book we present several techniques built on this coherency framework to handle various appearance modeling tasks both for surface reflections and subsurface scattering, the two primary physical components that generate material appearance. We believe that coherency-based appearance modeling will make it easier and more feasible for practitioners to bring computer graphics imagery to life. This book is aimed towards readers with an interest in computer graphics. In particular, researchers, practitioners and students will benefit from this book by learning about the underlying coherence in appearance structure and how it can be utilized to improve appearance modeling. The specific techniques presented in our manuscript can be of value to anyone who wishes to elevate the realism of their computer graphics imagery. For understanding this book, an elementary background in computer graphics is assumed, such as from an introductory college course or from practical experience with computer graphics.
Facilitating the Acquisition of Realistic Material Appearance Models
Facilitating the Acquisition of Realistic Material Appearance Models - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Facilitating the Acquisition of Realistic Material Appearance Models write by Yitzchak Lockerman. This book was released on 2016. Facilitating the Acquisition of Realistic Material Appearance Models available in PDF, EPUB and Kindle.
Principles of Appearance Acquisition and Representation
Principles of Appearance Acquisition and Representation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Principles of Appearance Acquisition and Representation write by Tim Weyrich. This book was released on 2009-08-20. Principles of Appearance Acquisition and Representation available in PDF, EPUB and Kindle. "Algorithms for scene understanding and realistic image synthesis require accurate models of the way real-world materials scatter light. This study describes recent work in the graphics community to measure the spatially- and directionally-varying reflectance and subsurface scattering of complex materials, and to develop efficient representations and analysis tools for these datasets. We describe the design of acquisition devices and capture strategies for reflectance functions such as BRDFs and BSSRDFs, efficient factored representations, and a case study of capturing the appearance of human faces"--Abstract.
Visual Texture
Visual Texture - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Visual Texture write by Michal Haindl. This book was released on 2013-01-18. Visual Texture available in PDF, EPUB and Kindle. This book surveys the state of the art in multidimensional, physically-correct visual texture modeling. Features: reviews the entire process of texture synthesis, including material appearance representation, measurement, analysis, compression, modeling, editing, visualization, and perceptual evaluation; explains the derivation of the most common representations of visual texture, discussing their properties, advantages, and limitations; describes a range of techniques for the measurement of visual texture, including BRDF, SVBRDF, BTF and BSSRDF; investigates the visualization of textural information, from texture mapping and mip-mapping to illumination- and view-dependent data interpolation; examines techniques for perceptual validation and analysis, covering both standard pixel-wise similarity measures and also methods of visual psychophysics; reviews the applications of visual textures, from visual scene analysis in medical applications, to high-quality visualizations in the automotive industry.
