网点的等视觉分级

利用回归分析方法建立网点百分比与视觉值之间的统计关系，测定出各种网点的印刷传递变形量，确定了一种科学、定量的等视觉网点分级方法。     

电子地图印刷网点修正模型的建立以及网点修正参数的确定

文中从地图的自动化生产出发 ,针对印刷网点的扩大特征 ,结合地图设计与出版系统 ,提出了链形网点阶调压缩的公式和各色各阶调网点的修正模型 ,并求出了各色各阶调网点的修正参数。     

应用计算机制作网点胶片

本文详细叙述了应用计算机技术制作高分辨率印刷网点胶片的原理和方法,重点对印刷胶片网点的的计算机构造、网点角度调整、网点模式设计及其计算机表示进行了讨论。并对计算机网点胶片制作的实现作具体介绍。     

网点再现与油墨流动性及纸张表面的关系

分数维Ｄ值能够表示印刷网点与底片上网点的相似性关系，本文用分数维法定量评价了印刷网点的再现性，主要分析了网点再现与网屏线数、网点面积率、纸张表面粗度及油墨物性的关系。     

网点印刷颜色再现物理模型

本文在讨论网点印刷呈色机理的基础上，提出四色版印刷时，用概率统计中的回归分析方法，修正Ｎｅｕｇｅｂａｕｅｒ方程，建立颜色再现物理模型。     

一种不区分网点扩大性质的印刷色彩复制数学模型

本文对两种性质的网点扩大进行详细分析，提出一种不区分网点扩大性质的印刷色彩复制模型。实验表明，该模型具有解算简单，精度高，修改方便的特点。     

柔性版印刷网点扩大与变形的研究与控制

从柔版印刷传递过程入手，分析印刷压力、加网线数、印版硬度等影响网点增大的几个主要因素，通过实验得到它们之间的影响曲线，最终提出控制柔版网点增大的控制方法，有利于实际生产中提高柔性版印刷品的质量。     

地图四色印刷网点面积率的计算

本文用《实用标准色卡》光谱反射率测试数据，研究了四色版网点地图印刷Ｎｅｕｇｅｂａｕｒｅ方程的修正。用回归分析方法确定修正系数ｎ＿ｘ，ｎ＿ｙ，ｎ＿ｚ，根据黑油墨网点梯尺各级三刺激值与相应网点面积率函数关系，确定黑版量，以此计算四色版地图印刷网点面积率，计算值和实测值相符。     

调频网点的印刷适性

调频加风是近几年随着计算技术发展而出现的一种新的复制工艺，它不同于一般的调幅加网，调频网印刷品具有阶调柔和、丰富、图像逼真和无莫尔效应的优点。本文根据调频网在小相等。但排列是随机的特点，主要了调频网点、印刷材料和印刷作业的印刷适性，以及在印刷中使用调频网点好处     

地图四色印刷网点面积积率的计算

本文用《实用标准色卡》光谱反射率测试数据，研究了四色版网点地图印刷Ｎｅｕｇｅｂａｕｒｅ方程的修正。用回归分析方法确定修正系数ｎｘ，ｎｙ，ｎｘ，根据黑油墨网点梯尺各级三刺激值与相应网点面积率函数关系，确定黑版量，以此计算四色版地图印刷网点面积率，计算值和实测值相符。     

BinSq: visualizing geographic dot density patterns with gridded maps

ABSTRACT

Dot maps have become a popular way to visualize discrete geographic data. Yet, beyond showing how the data are spatially distributed, dot maps are often visually cluttered in terms of consistency, overlap, and representativeness. Existing clutter reduction techniques like jittering, refinement, distortion, and aggregation also address this issue, but do so by arbitrarily displacing dots from their exact location, removing dots from the map, changing the spatial reference of the map, or reducing its level of detail, respectively. We present BinSq, a novel visualization technique to compare variations in dot density patterns without visual clutter. Based on a careful synthesis of existing clutter reduction techniques, BinSq reduces the wide variety of dot density variations on the map to a representative subset of density intervals that are more distinguishable. The subset is derived from a nested binning operation that introduces order and regularity to the map. Thereafter, a dot prioritization operation improves the representativeness of the map by equalizing visible data values to correspond with the actual data. In this paper, we describe the algorithmic implementation of BinSq, explore its parametric design space, and discuss its capabilities in comparison to six existing clutter reduction techniques for dot maps.     

一种加网图像去网的算法

采用查找网点中心的方法，计算出任意加网图像的网点网格，按网格中网点的面积率来转换成灰度值，改变二值图属性，从而达到去网的目的。实验结果表明，去网效果与加网图像的分辨率、加网线数、加网角度等因素有关。使用此算法可以得到较满意的去网效果，可以合成出满足打样要求的彩色图像，用于RIP后图像的数字打样。     

Creating a Dot Density Map: Resident Population in Mainland Portugal

Dot maps are one of the best ways to visualize absolute values in thematic cartography. Dots represent quantitative data on a map. Population is often used in this type of representation. This paper presents a population dot density map for the year 2011 on two scales: (1) for mainland Portugal, and (2) for the Lisbon and Oporto regions. We have used dots with constant values and sizes at the most detailed statistical level (i.e. statistical subsection) for localities with less than 5000 inhabitants, and proportional circles for localities with more than 5000 inhabitants. These two scales of analysis coupled with two cartographic representation techniques used on a single map allow for a clear reading of the distribution of population.     

Identification of Optimal Colours for Maps from the Web

Abstract

Maps which are created on demand by combining geospatial data from different Web Map Services integrate conflicting portrayals and do not satisfy the requirements of effective cartographic communication. A significant improvement is achieved by selecting clearly distinguishable colours which are determined by solving an optimisation problem. Cartographic guidelines and user characteristics (e.g. colour vision impairment) can be incorporated into the optimisation model as constraints which guide the selection of colours.     

基于ACAD的数字地籍成图系统

提出了“数字地籍成图系统”的设计思想,说明了数字地籍图的图层和颜色的设置方案及各类地图符号的绘制方法,介绍了系统的图形编辑功能、数据采集功能、汉字注记功能和图表输出功能,向用户推荐一个方便实用、功能丰富的数字地籍成图工具。     

Towards a Deeper Understanding of Cartographic Text Visualisation: Assessment of User Preferences and Colour Influence

The main goal of this research is to investigate the influence of a map’s background colour on user preferences regarding labels’ typography, including their size, shape, orientation and texture. Four sets of backgrounds were tested: blank maps, grey scale, hot colours and cold colours. The foreground of these maps is populated with name labels, which are associated with point objects or areal objects. Bertin’s visual variables were applied to this set of name labels, both separately and in combination. User preferences of different typographic variations were registered and compared on the basis of different background colours using a one-way ANOVA. The results indicated that the typographic design of the map labels should not be adapted according to the map’s background colour.     

基于多层次误差扩散加网的数字水印算法研究

提出了一种结合多层次误差扩散加网(multi-scale error diffusion)的印刷打印图像数字水印算法,将信息隐藏在图像密度较小的区域,提高了水印的检测成功率,为印刷打印数字水印技术的推广提供了一种可供参考和借鉴的方法。     

面积率α幂修正Neugebauer方程

网目调地图彩色印刷颜色再现 ,由于光在油墨和纸张第一表面上的反射和光在油墨和纸张内部的多重反射 ,将产生网点在转移过程中面积率的扩张和亏损。这一效应将破坏原始 Neugebauer方程关于色块三剌激值和网点面积率之间的线性关系。本文作者提出面积率 α幂修正的 Neugebauer方程 ,对于三色和四色印刷过程给出计算结果。