3D Shape Reconstruction from Sketches via Multi-view Convolutional Networks

We propose a method for reconstructing 3D shapes from 2D sketches in the form of line drawings. Our method takes as input a single sketch, or multiple sketches, and outputs a dense point cloud representing a 3D reconstruction of the input sketch(es). The point cloud is then converted into a polygon mesh. At the heart of our method lies a deep, encoder-decoder network. The encoder converts the sketch into a compact representation encoding shape information. The decoder converts this representation into depth and normal maps capturing the underlying surface from several output viewpoints. The multi-view maps are then consolidated into a 3D point cloud by solving an optimization problem that fuses depth and normals across all viewpoints. Based on our experiments, compared to other methods, such as volumetric networks, our architecture offers several advantages, including more faithful reconstruction, higher output surface resolution, better preservation of topology and shape structure.Comment: 3DV 2017 (oral

ANDRÉ BRETON AND J.R.R. TOLKIEN: SURREALISM, SUBCREATION AND FRODO’S DREAMS

Tolkien knew and correctly understood the Surrealism of André Breton and, although he did not share its fundamental theoretical assumptions, he nevertheless included surrealist dream experiences in his work through the dreams of Frodo. This thesis will be demonstrated by dividing the study into three sections: - the first section will examine the development of Breton’s Surrealism in England and demonstrating that the Inklings were well aware of this contemporary avant-garde ; - the second section, will explain what Surrealism meant to Breton, how well Tolkien understood this, and how his creative sub-theory turned out to be the opposite of the surrealist perspective; - the third section, will show that, despite this diversity, the character of Frodo also includes typically modern and surrealist dream experiences

Feature Lines for Illustrating Medical Surface Models: Mathematical Background and Survey

This paper provides a tutorial and survey for a specific kind of illustrative visualization technique: feature lines. We examine different feature line methods. For this, we provide the differential geometry behind these concepts and adapt this mathematical field to the discrete differential geometry. All discrete differential geometry terms are explained for triangulated surface meshes. These utilities serve as basis for the feature line methods. We provide the reader with all knowledge to re-implement every feature line method. Furthermore, we summarize the methods and suggest a guideline for which kind of surface which feature line algorithm is best suited. Our work is motivated by, but not restricted to, medical and biological surface models.Comment: 33 page

Virtual studio: a digital repository in architectural education

The “virtual studio” is a project exploring the potential of virtual learning environments to augment conventional studio culture in the Lincoln School of Architecture. Staff saw an opportunity to bridge the long-acknowledged divide in learning between theory, technology and studio practice by linking a wide range of digital material and media from across the curriculum within a single virtual space, both formal learning objects created by staff and work produced by students. Early in its development the project was expanded to link with Lincoln’s JISC-funded Institutional Repository which aims to establish a digital repository of teaching and learning objects and peer-reviewed research across the University. The School of Architecture was to be an initial test bed for the creation of a more generic, university-wide repository. However, architecture is an atypical discipline; its emphasis is more visual than literary, more practice than research-based and its approach to teaching and learning is more fluid and varied than either the sciences or the humanities (Stevens, 1998). If we accept that it is social interests that underlie the development of technology rather than any inevitable or rational progress (Bijker, 1997), the question arises as to what extent an institutional repository can reconcile architectural interests with the interests of other disciplines. Architecture and the design disciplines are marginal actors in the debate surrounding digital archive development, this paper argues, and they bring problems to the table that are not easily resolved given available software and that lie outside the interests of most other actors in academia

Associating object names with descriptions of shape that distinguish possible from impossible objects.

Five experiments examine the proposal that object names are closely linked torepresentations of global, 3D shape by comparing memory for simple line drawings of structurally possible and impossible novel objects.Objects were rendered impossible through local edge violations to global coherence (cf. Schacter, Cooper, & Delaney, 1990) and supplementary observations confirmed that the sets of possible and impossible objects were matched for their distinctiveness. Employing a test of explicit recognition memory, Experiment 1 confirmed that the possible and impossible objects were equally memorable. Experiments 2–4 demonstrated that adults learn names (single-syllable non-words presented as count nouns, e.g., “This is a dax”) for possible objectsmore easily than for impossible objects, and an item-based analysis showed that this effect was unrelated to either the memorability or the distinctiveness of the individual objects. Experiment 3 indicated that the effects of object possibility on name learning were long term (spanning at least 2months), implying that the cognitive processes being revealed can support the learning of object names in everyday life. Experiment 5 demonstrated that hearing someone else name an object at presentation improves recognition memory for possible objects, but not for impossible objects. Taken together, the results indicate that object names are closely linked to the descriptions of global, 3D shape that can be derived for structurally possible objects but not for structurally impossible objects. In addition, the results challenge the view that object decision and explicit recognition necessarily draw on separate memory systems,with only the former being supported by these descriptions of global object shape. It seems that recognition also can be supported by these descriptions, provided the original encoding conditions encourage their derivation. Hearing an object named at encoding appears to be just such a condition. These observations are discussed in relation to the effects of naming in other visual tasks, and to the role of visual attention in object identification

International technology transfer: building theory from a multiple case-study in the aircraft industry

International technology transfer occurs frequently in international operations, for example in\ud cases of foreign direct investment where companies set-up existing manufacturing lines in new\ud locations. It also occurs in situations of international outsourcing where a new supplier receives\ud product and/or production process information. This technology transfer process often leads to\ud difficulties, for example delays and much higher costs than anticipated. To gain insight into the\ud causes of these difficulties we used a grounded theory approach to describe the process of\ud international production technology transfer. We conducted four case studies in the aircraft\ud industry and analyzed the problems that occurred. We found that technology transfer consists of\ud three phases: preparation, installation and utilization. These three phases are influenced by three\ud types of factors: technological, organizational and environmental. The combination of activities\ud with factors enables an integrated view on international technology transfer. We found that the\ud amount of technology, the accuracy of information, and the extent of organizational and\ud environmental differences have a large impact on the efficiency of the technology transfer\ud process