基于虚拟地理信息系统技术的城市道路路线设计研究

通过虚拟现实和地理信息系统在城市道路路线设计中应用的研究,论述该系统的功能及其在城市道路路线平、纵、横道路路线设计的应用,说明该系统是计算机在城市道路设计上应用的一个飞跃。     

矿山测量中的数字化测量技术整合运用

针对矿山测量的数字化测量方法,对数字化测量技术的运用及整合进行分析。分析该技术在矿山测量中的运用价值,旨在通过矿山测量技术的科学运用,提高矿山测量的准确性,推动测量行业的稳定发展。     

Turning a Digital Camera into an Absolute 2D Tele‐Colorimeter

We present a simple and effective technique for absolute colorimetric camera characterization, invariant to changes in exposure/aperture and scene irradiance, suitable in a wide range of applications including image‐based reflectance measurements, spectral pre‐filtering and spectral upsampling for rendering, to improve colour accuracy in high dynamic range imaging. Our method requires a limited number of acquisitions, an off‐the‐shelf target and a commonly available projector, used as a controllable light source, other than the reflected radiance to be known. The characterized camera can be effectively used as a 2D tele‐colorimeter, providing the user with an accurate estimate of the distribution of luminance and chromaticity in a scene, without requiring explicit knowledge of the incident lighting power spectra. We validate the approach by comparing our estimated absolute tristimulus values (XYZ data in ) with the measurements of a professional 2D tele‐colorimeter, for a set of scenes with complex geometry, spatially varying reflectance and light sources with very different spectral power distribution.     

Accuracy and reliability of a technique for quantifying foot shape,dimensions and structural characteristics

A technique using a three-dimensional digitizing device for the measurements of foot dimension, shape and structural characteristics was developed. A total of 23 variables were calculated from the coordinates of 26 digitized points on the foot and the leg when body weight was supported mainly by one foot as the other foot was resting on a platform. All variables were measured with reference to an anatomically defined reference frame on the foot. The intra- and intertester reliability were tested both for the device and for the foot measurements. High reliability (ICC> 0.999) was found for the device in measuring distances and angles on a plastic cube. Intra- and intertester reliability for the foot measurements were high (ICC> 0.8) in most of the variables, with the lowest intratester reliability of 0.57 and the lowest intertester reliability of 0.38.     

AP1000控制棒棒位的数字化测量技术分析

结合AP1000的数字化棒位指示系统,通过分析AP1000控制棒的组成、控制棒驱动机构和棒位测量探测器布置,并从数字化测量角度指出了非接触式传感器测量、探测线圈的冗余设计和数字化数据传输等可靠性技术的应用,确保了AP1000反应堆棒位测量精度和棒位控制系统的安全可靠。     

Genuinity Signatures: Designing Signatures for Verifying 3D Object Genuinity

3D computer graphics models and digitally-controlled manufacturing have come together to enable the design, visualization, simulation, and automated creation of complex 3D objects. In our work, we propose and implement a framework for designing computer graphics objects and digitally manufacturing them such that no adversary can make imitations or counterfeit copies of the physical object, even if the adversary has a large number of original copies of the object, knowledge of the original object design, and has manufacturing precision that is comparable to or superior to that of the legitimate creator of the object. Our approach is to design and embed a signature on the surface of the object which acts as a certificate of genuinity of the object. The signature is detectable by a signature-reading device, based on methods in computer graphics and computer vision, which contains some of the secret information that was used when marking the physical object. Further, the compromise of a signature-reading device by an adversary who is able to extract all its secrets, does not enable the adversary to create counterfeit objects that fool other readers, thereby still enabling reliable copy detection. We implemented a prototype of our scheme end-to-end, including the production of the physical object and the genuinity-testing device.     

论数字化地籍调查成果的规范化管理

论述了数字化地籍调查成果在管理中存在的主要问题，并对科学、规范的管理数字化地籍调查成果提出了相应的建议     

集成建筑范式的缘起与发展

一般地认为．集成范式滥觞于二战结束后的大规模工业化生产并伴随着系统论的诞生。作者认为大致有三个方面的作用促使集成设计思想的缘起：一是科学和哲学的推动，二是建筑本身日益增长的复杂性：三是工业化的生产方式的促进作用。在当代，以计算机技术为代表的信息化成为集成建筑范式的外在动力，而人们对与环境的需求则成为其内在的动力。但在真实的语境下，先进技术往往还只是各类研讨会上设计先锋们的主题或话题。无论是先锋建筑师还是激进的建筑学院．他们过多沉湎于虚幻图像的追寻，过分崇尚各种算法与美仑美奂的形态，结果忽视了普适性项B的建造实践。那些大量性的民用建筑以及它们的设计者——诸多改制而来的各级设计院，依然在沿袭传统的设计范式。     

浅析档案馆建筑设计的当代转型

20世纪90年代以来,中国的档案事业建设领域的观念发生了积极的变革。本文结合设计实践。探讨了档案馆建筑设计在此背景下正在面临的开放化、数字化和集约化三个重要的观念与策略转型。     

Coded exposure HDR light‐field video recording

Capturing exposure sequences to compute high dynamic range (HDR) images causes motion blur in cases of camera movement. This also applies to light‐field cameras: frames rendered from multiple blurred HDR light‐field perspectives are also blurred. While the recording times of exposure sequences cannot be reduced for a single‐sensor camera, we demonstrate how this can be achieved for a camera array. Thus, we decrease capturing time and reduce motion blur for HDR light‐field video recording. Applying a spatio‐temporal exposure pattern while capturing frames with a camera array reduces the overall recording time and enables the estimation of camera movement within one light‐field video frame. By estimating depth maps and local point spread functions (PSFs) from multiple perspectives with the same exposure, regional motion deblurring can be supported. Missing exposures at various perspectives are then interpolated.