Light field image processing: an overview

Light field imaging has emerged as a technology allowing to capture richer visual information from our world. As opposed to traditional photography, which captures a 2D projection of the light in the scene integrating the angular domain, light fields collect radiance from rays in all directions, demultiplexing the angular information lost in conventional photography. On the one hand, this higher dimensional representation of visual data offers powerful capabilities for scene understanding, and substantially improves the performance of traditional computer vision problems such as depth sensing, post-capture refocusing, segmentation, video stabilization, material classification, etc. On the other hand, the high-dimensionality of light fields also brings up new challenges in terms of data capture, data compression, content editing, and display. Taking these two elements together, research in light field image processing has become increasingly popular in the computer vision, computer graphics, and signal processing communities. In this paper, we present a comprehensive overview and discussion of research in this field over the past 20 years. We focus on all aspects of light field image processing, including basic light field representation and theory, acquisition, super-resolution, depth estimation, compression, editing, processing algorithms for light field display, and computer vision applications of light field data

Sciences of human settlements: Searching for the theory and practice

The author is Professor of Architecture and Urban Studies, Tsinghua University, Beijing, People's Republic of China; member of the Chinese Academy of Sciences; member of the Chinese Academy of Engineering; and Director of both the Institute of Architectural and Urban Studies and the Center for Human Settlements, Tsinghua University. He is also a member and former President of the World Society for Ekistics (WSE). The text that follows is a slightly edited and revised version of a paper presented at the WSE Symposion "Defining Success of the City in the 21st Century," Berlin, 24-28 October, 2001.</jats:p

Coping with urbanization in China: The role of the sciences of human settlements and planning practice

The author is Professor of Architecture and Urban Studies , Tsinghua University, Beijing, People's Republic of China; member of the Chinese Academy of Engineering; and Director of both the Institute of Architectural and Urban Studies and the Center for Human Settlements, Tsinghua University. He is also a member and former President of the World Society for Ekistics (WSE). The text that follows is a slightly edited and revised version of a paper presented at the international symposion on "Globalization and Local Identity," organized jointly by the World Society for Ekistics and the University of Shiga Prefecture in Hikone, Japan, 19-24 September, 2005.</jats:p

The voicer's reactions to voice: an examination of employee voice on perceived organizational status and subsequent innovative behavior in the workplace

PurposeThe purpose of this paper was to explore the voicer's own psychological or behavioral reactions to voice. A framework was proposed to predict how and when employee voice is related to innovative behavior in the workplace based on conservation of resources theory.Design/methodology/approachData was collected from a three-wave survey including 232 employees and their supervisors. Hierarchical multiple regression and PROCESS, a SPSS macro, were used to test the hypotheses.FindingsEmployee voice was positively associated with innovative behavior. Perceived organizational status mediated the link between voice and innovative behavior. Meanwhile, performance-goal orientation strengthened the positive voice–perceived organizational status and voice–innovative behavior associations.Originality/valueThis paper extended the authors’ understanding of the outcomes of voice by elucidating that voice could motivate the psychological or behavioral reactions of not only team members but also the voicer himself/herself. In addition, it highlighted the value of performance-goal orientation in strengthening the potentially positive relationship between voice and perceived organizational status. In doing so, the authors identified the unexplored individual-level psychological and behavioral reactions of the voicer himself/herself after speaking up. The present study also provided practical implications by shedding light on measures to promote innovative behavior in the workplace.</jats:sec