Chromatic adaptation in a 2D photograph demonstrated by a D‐up viewer

It is said that we cannot have color constancy in a photograph. The concept of recognized visual space of illumination (RVSI) asserts that chromatic adaptation occurs when one perceives the illumination that is filling a space and not the objects in the space. It predicts then that if one perceives a 3D scene in a photograph, then color constancy will occur in the photograph. In this work, a dimension‐up (D‐up) viewer was developed to perceive a 3D scene on a 2D photograph, and the effect of chromatic adaptation was measured by the color appearance of a gray patch placed at the center of the photograph. Subjects saw the patch as a vivid color when they saw a photograph that had been taken under colored illumination, which is a normal experience in a real space observation. When the color appearance was measured by the elementary color naming method, the amount of chromaticness of the patch in percentage and the apparent hue were very similar to those observed in the 2‐room technique, thus confirming the prediction by the RVSI theory.     

黏土微结构参数的相关分析和主成分分析

将统计学中的相关分析和主成分分析方法引入到对土微结构参数的研究之中,并给出了具体分析方法。从而不仅可以消除不同微结构参数在反映土体内部机理方面存在的"部分信息重复"现象,而且可以大大降低微结构参数的维数。根据对累积贡献率的要求不同,可以用不同数目的主成分近似表达所有微结构参数携带的大部分信息,这使得微结构参数的广泛应用成为可能。降维得到的主成分指标,可以用来建立本构方程、强度准则等土力学关系,以反映土微结构特征与宏观力学现象之间的固有联系;并可以利用建立的关系研究土微结构再造过程。对由64幅SEM照片组成的黏土样本进行的域微结构分析表明,微结构参数之间存在明显的"信息重复"现象,2个主成分就可以反映6个原始微结构参数95.28%的信息,从而达到了降维目的。     

自由设站监测深基坑支护结构变形的新方法

自由设站监测深基坑支护结构变形的新方法,使用经纬仪或电子经纬仪测量变形点的水平角和竖直角,自由测站,不需要量取仪器高度,外业操作简便,对施工影响小,不受施工现场场地狭窄的限制,能取得较好的三维位移监测精度,为深基坑支护结构提供可靠的变形信息。     

智能电网调度控制系统图形广域维护与浏览技术

随着电网互联和特高压交直流混合跨区输电的快速发展,电网运行特征发生了深刻变化,对大电网运行监控画面也提出了新要求。文中针对现有智能电网调度控制系统画面浏览方式无法满足在同一幅画面中集中监视跨调度机构的特高压联络线的问题,提出一种电网图形广域维护和浏览方式。该方式通过引入设备模型广域检索、广域文件统一管理和推送、画面广域模型的定义和维护、实时画面广域浏览等技术,实现特高压互联电网关键设备的一体化监视。该技术已在调控中心试点应用,满足送受端国调分中心、省调对特高压跨区交直流设备运行状态和运行风险提示的实时监控需求。     

用于连铸坯摄像定尺的标定装置

为了获得连铸坯坯头准确的位置数据,确保连铸坯的定尺精度,开发了用于连铸坯摄像定尺的标定装置。介绍了此装置的原理、组成和设计以及该标定装置在钢厂的实际应用情况。实践表明:该标定装置结构简单、质量轻、操作方便,能一次性标定完所有不同截面尺寸的连铸坯,标定时间少。     

A soft‐cache strategy for pathologist's navigation in virtual microscopy

Navigation through large microscopical images demands special characteristics like flexibility to access image data and progressive recovery or relevant information, i.e., several qualities, magnifications, and random accesses to any desired Window of Interest in the Virtual Slide (VS). Nowadays there exist systems that allow such interaction, but with a certain delay, which is dependent on the application. It has been shown that caching or prefetching policies can speed up interaction with these systems. This article presents an optimal soft‐cache strategy, which improves the navigation times in virtual microscopy. The entire method includes an optimal soft‐cache strategy and a dynamical probabilistic model of a pathologist's navigation. This strategy was implemented as a Client‐Server application, using the JPEG2000‐JPIP standard and evaluated using different navigation patterns, namely, four different pathologists exploring 10 VS, stained with different dyes. The present approach was compared with a conventional soft‐cache method and the cache performance improved, in average, in about a 10%. Microsc. Res. Tech., 2011. © 2010 Wiley‐Liss, Inc.     

一种虚拟在线浏览系统的通用快速开发方法

针对目前各行业虚拟在线浏览系统需求的增长,结合虚拟现实开发平台Virtools的快速的＂可视化编程＂开发方法和便捷的网络发布功能的优势,提出了一种通用的虚拟在线浏览系统的快速开发方法,并详细给出了系统实现关键技术和典型功能实现脚本流程图,包括三维场景优化技术、鼠标和键盘驱动的自主交互导览实现方法等.最后通过实例证明了提出方案的可行性和高效性,该方法可为各行业人员开发虚拟浏览系统的网络应用提供良好的技术支持.     

Tracking down some ancient baboons.

In this article the author recounts his search to find an original picture of an ancient Egyptian Sun Sanctuary nearby the temple Abu Simbel. The author learned that the sun sanctuary had been dismantled in 1915, the baboons transported to the Egyptian Museum in Cairo for safekeeping. Thus if he were to have a proper photograph of the baboons in their original setting, it would have to have been taken before 1915. After searching a seven volume index to every site in Egypt, Dr. Spanel reported that such a picture can be found in Gaston Maspero’s Rapports relatifs á la consolidation des temples, published in Cairo in 1911 by the Institut fran?ais d'archéologie orientale. So, it was not long after the author sent off his third request that an express envelope arrived from Egypt, with a fine copy of the photograph and a cover letter from the director, saying that he was sending it with his compliments and best wishes. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Perspective in urban design

Abstract

A novel method is suggested for assessing the visual impact of proposed buildings. It involves the accurate placing of the buildings perspective onto an unaltered oblique photograph of the existing environment. How to find scales and vanishing points of a photograph and how to compute perspectives' co-ordinates within such a photograph on a programmable calculator is outlined in the Appendix.     

组建照片档案信息化的思考与探索

在信息技术几乎渗透到了社会活动每个角落的今天,档案的存储方式和存储载体正在发生巨大的变化。本文主要对照片档案的形成、传递、存储和利用等方面在当今信息基础上的运动新规律、新需求、新应用进行研究和探索。