We present a fast, novel image-based technique for reverse engineering woven fabrics at a yarn level. These models can be used in a wide range of interior design and visual special effects applications. To recover our pseudo-Bidirectional Texture Function (BTF), we estimate the three-dimensional (3D) structure and a set of yarn parameters (e.g., yarn width, yarn crossovers) from spatial and frequency domain cues. Drawing inspiration from previous work [Zhao et al. 2012], we solve for the woven fabric pattern and from this build a dataset. In contrast, however, we use a combination of image space analysis and frequency domain analysis, and, in challenging cases, match image statistics with those from previously captured known patterns. Our method determines, from a single digital image, captured with a digital single-lens reflex (DSLR) camera under controlled uniform lighting, the woven cloth structure, depth, and albedo, thus removing the need for separately measured depth data. The focus of this work is on the rapid acquisition of woven cloth structure and therefore we use standard approaches to render the results. Our pipeline first estimates the weave pattern, yarn characteristics, and noise statistics using a novel combination of low-level image processing and Fourier analysis. Next, we estimate a 3D structure for the fabric sample using a first-order Markov chain and our estimated noise model as input, also deriving a depth map and an albedo. Our volumetric textile model includes information about the 3D path of the center of the yarns, their variable width, and hence the volume occupied by the yarns, and colors. We demonstrate the efficacy of our approach through comparison images of test scenes rendered using (a) the original photograph, (b) the segmented image, (c) the estimated weave pattern, and (d) the rendered result.
president's letterIt is a great honor to have been elected ACM President. I must say it's been an interesting road to this juncture. My first ACM role was volunteering to maintain the mailing list of my local SIGGRAPH chapter in Paris in the mid-1980s. Over the last 25 years, I have continued to volunteer for many different roles within the organization. I am proud to be the first French citizen and the second European to hold this position, as it clearly illustrates that ACM has become a truly international organization. I'm looking forward to the day when we can look back at this time as the beginning of a long chain of volunteer leaders coming from countries throughout every region of the world.This organization is largely built on the energy and devotion of many dedicated volunteers. I'd like to take this opportunity to share some thoughts on the value of volunteering at ACM. When you look at all of the activities that make up the offerings of our organization, it is amazing to note that members who volunteer their time to deliver the content we provide do the vast majority of the work. There are many opportunities for members to step forward and donate their time to the success of ACM's various endeavors.I recently attended the annual SIG-GRAPH conference in Los Angeles where volunteer efforts are highly visible. With a multimillion-dollar budget, it is by far the largest conference that ACM sponsors, attracting tens of thousands of attendees every year. Though a conference of that size calls upon many highly skilled professional contractors to implement the vision of the conference organizers, the content is selected and organized by volunteers. I encourage you to visit Communications' Web site (http://cacm.acm.org) to view a dynamic visual representation of how much work went into the preparation of the conference over a threeyear period. Created by Maria Isabel Meirelles, of Northeastern University, Boston, the series of graphs illustrate how volunteer involvement increased dramatically over the 40-month preparatory period as we got closer to the dates of the event. By the time the conference took place a total of over 580 volunteers had put in over 70,000 hours of work to make the conference successful. That's over eight years of cumulated effort! Not all ACM endeavors require as much volunteer effort as the annual SIGGRAPH conference. There are a multitude of tasks that you, as a member of this organization, can volunteer your services for. You can start by checking out the ACM professional chapter in your area. We have ACM general interest chapters as well as more specialized chapters associated with any of ACM's 34 special interest groups, (SIGs) that can use volunteer support. Tasks cover everything from greeting people at an event hosted by your local chapter to maintaining a Web presence for a particular activity. If a chapter does not yet exist in your area, you can volunteer to establish one. From there you can consider volunteering to help organize a conference or being a referee to evaluate th...
In this paper we present PEPIN, a relational data base management system implemented on microcomputers, written in PASCAL and developped by the performance evaluation project at INRIA. At the moment, as we work towards a totally distributed system, the base versions of PEPIN are operational and support tasks oriented to office automation applications.
The various institution and developments in the field of computer graphics in Germany is discussed. The German Research Foundation( DFG), as recognition of research in computer graphics, sponsors a special interdisciplinary graduates study program on 3D image analysis and synthesis at the University of Erlangen-Nuremburg. The German Association for Informatics, founded in 1983, brings together about 40 representatives from Universities, colleges and industry that co-ordinate activities form five subgroups specializing in foundations and systems, imaging and visualization, graphical user interfaces, simulation and animation, and geometric modeling. Several companies and forums working in the area of computer graphics are situated in Darmstadt
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