谈谈用区域填充算法计算遥感图象面积

本文论述了计算机图形学中的区域填充算法,并选用了一种高效率填充算法在微机上编程实现。然后较详细地讨论了如何用它来计算遥感图象中感兴趣区域的面积。     

基于MFC和OpenGL的快速填充等值线实现

通过等值线的绘制与填充过程分离的编程思想, 先用OpenGL 硬件加速的光栅化技术实现区域快速填充, 然后利用MFC 下的GDI 绘图功能在相同的区域上绘制等值线。该方法不涉及到复杂的算法, 用很简单的代码就能实现与商业软件视觉效果相媲美的等值线填充效果, 且适用于离散区域为任意形状的多边形网格系统。     

熔焊成型中截面填充算法及软件实现

本文针对熔焊成型的特点,提出了一套适合熔焊成型的截面填充算法。该算法对截面轮廓进行内、外轮廓以及复连通区域和单连通区域的判定,将复连通区域剖分并对单连通区域的单调划分,最后对单调区域进行填充扫描,生成用于熔焊快速成型的数控指令。该截面填充算法采用VC 、OpenGL编程实现,生成的数控代码在成型机床上得到验证。     

复杂多边形区域边界搜索算法的研究

首先分析了经典的区域填充算法的两个问题。在此基础上，借鉴种子填充算法的一些思想，提出了一种针对任意复杂多边形区域的搜索算法，该算法克服了传统算法的一些缺陷，可以满足实际编程需要。     

基于边界信息的孔洞填充算法

为了克服传统填充算法无法自动识别孔洞区域的不足,提出了一种基于边界信息的孔洞填充算法.利用边界跟踪得到内外边界的几何位置信息,进而确定孔洞边界,然后利用孔洞边界进行扫描线填充.与种子填充算法和扫描线填充算法相比,该算法无须对整个区域进行复杂的运算,能够避免过多的重复运算,降低了算法的复杂程度,易于编程实现.实验结果表明,该算法运行速度快,并且对任意形状的物体都是有效的.     

适用于任意复杂区域的全自动填充方法

针对图像分析中区域填充算法的自动化和通用性要求,对种子填充算法进行改进,提出了反向注入式种子填充算法。与常规的区域填充算法相比,该算法的特点是包括初始种子点在内的所有填充区域均完全由计算机自主、高效地处理,实现了任意复杂区域填充的普遍适用性,解决了扫描线算法和种子填充算法的不足。该算法能一次完成包含多个区域的填充问题,在处理多而密集区域的填充问题上具有很高的效率。     

一种基于缝隙码的区域填充算法

提出了一种基于缝隙码的区域填充算法。给出了单条缝隙码的填充算法,及多连通区域或整幅图像的快速填充算法,能填充任意复杂图像区域,对多连通区域或整幅图像填充时,算法只对图像区域填充,不用对区域外或区域内部的孔洞进行填充,对非二值图像,该算法不需要辅助内存空间。实验结果表明,对比现有的算法,本文算法具有速度快、效率高等优点。     

浅析区域填充算法

区域填充算法广泛应用于各个领域,经典的区域填充算法存在若干问题,在分析了两种传统区域填充算法的原理的基础上,阐述了两种改进的区域填充算法。     

基于扫描线转换的快速等值线填充算法

提出了一种基于扫描线转换的等值线快速填充算法。与现有的逐点扫描法和区域填充算法相比,该算法既不需要进行逐点插值计算,也不需要追踪等值区域,判断区域包含关系,因而填充速度很快,且填充结果与区域填充法结果一致。实践证明该算法可以在毫秒级完成等值线图的填充。     

VB实现不规则区域的填充

本文提出了一种简单的不规则区域快速填充算法。该算法解决了传统的递归算法在填充较大区域时堆栈溢出的缺 点,实现了填充区域的形状、大小均未知的情况下,对该区域的填充。     

通用扫描线多边形填充算法

传统的扫描线多边形填充算法只适用于水平扫描线的逐行填充。文章提出通用扫描线多边形填充算法,该算法可以有效地解决任意间距、任意倾角的扫描线对多边形的填充问题。通用扫描线多边形算法采用了坐标变换、浮点数舍入策略等重要方法。顶点扫描线号是该算法中的核心概念。     

Filling Complex Polygons by Region-Fill Methods on Raster Graphics Terminals

A method is described for filling polygons according to the GKS Fill Area definition on terminals that provide only region-filling capabilities. The advantages and disadvantages of using this algorithm in GKS device drivers are considered.     

基于决策树的数据遗失值填充方法的研究

数据遗失值填充问题是预处理过程中的一个难点。已有的算法大多寻求数据中属性值之间的关系、属性与属性值之间的关系、属性与属性间的关系来对遗失值进行填充。文章从数据间的关系入手，引入相似度的概念，并提出一种新的数据遗失值填充算法。这种算法简单，易于理解，可对一个数据具有多个遗失值的情况进行填充。     

A Method of Displaying Transformed Picture Rectangles Using GKS Raster Functions

The GKS raster functions Fill Area and Cell Array allow area primitives in Computer Graphics to be used in a GKS environment.
In implementing these functions, the computing time and memory required are important factors in deciding their usability especially for interactive work. The trend in the implementation of algorithms for such primitives is to use specialized hardware.
In this paper, algorithms are introduced which are suitable for computers of low and middle efficiency and provide a sufficient image quality and an acceptable response time for dialogues.     

The μFill: A New 96-/384- Well Microplate Reagent Dispenser for HTS and Drug Discovery

Today's biomedical research requires instrumentation that is both functional and versatile. While high throughput screening (HTS) and drug discovery laboratories require instrumentation that can be automated, pilot assay laboratories may not necessarily need total automation. Towards that end, Bio-Tek has developed the μFill, a 96-/384- well microplate reagent dispenser capable of running stand-alone or computer-controlled as part of a robotics system. The μFill is compatible with both 96- and 384-well microplates, and using a specially designed adaptor can also dispense to deep-well microplates. It is capable of dispensing from 10-3000 μl for 96- well plates and 5-1500 μl for 384-well plates in 1-μl increments. The μFill can dispense 20 μl into a 96-well plate in four seconds and into a 384-well microplate in 12 seconds. The microprocessor-controlled syringe pump is based on a tested, low-maintenance design that requires no calibration, yet provides a high degree of accuracy and precision. The accuracy with an 80 μl dispense is within 1 μl with a percentage CV of less than 2%, and with a dispense volume of 20 μl, the percentage CV is still less than 5%. For those needing to dispense organic solvents or sterile aqueous solutions, a model that is autoclavable and has increased solvent resistance is also available. The programming allows for the control of flow rates from 225 μl/well/sec, for dispensing to cell cultures, and to 1000 μl/well/sec for rapid and vigorous reagent dispensing. The flexible software provides complete programming capabilities from the keypad. For more complete automation, robotics interfaces can be developed using ActiveX® software commands. The μFill's size, with a 14 x 14-inch footprint and a height of seven inches, allows it to be used almost anywhere.     

企业级移动互联微信信智能服务平台设计实现研究

《移动互联微信信智能服务平台》致力于为企业打造优秀的公众服务平台,提升客户消费体验与服务.通过定制微信信服务的商家或者企业,可以为客户提供有价值信息的订阅;添补微信O2O业务流程中的沟通环节的缺失;提升客户的商业咨询活跃度、促进移动消费习惯;提升客户的服务体验,拉近与客户之间的关系.本文介绍企业级移动互联微信智能服务平台设计实现模块组成.     

Parametric Surfaces in PHIGS PLUS: a New Chance for Patterning and Hatching?

The Polygon Fill style PATTERN and HATCH, which are quite successful in 2D graphics standards as GKS¹ and CGI² have proved to be less suitable for 3D graphics standards as GKS-3D³ and PHIGS⁴. However, the emerging standard PHIGS PLUS⁵ offers a unique chance to successfully employ these Interior Styles (under another name and in a slightly different form), because PHIGS PLUS supports a.o. topologically rectangular parametric surfaces In this article it is shown how these Interior Styles could be efficiently applied to curved surfaces in PHIGS PLUS. In addition, the possible interaction between the tessellation method and the patterning is shown.     

A peer IF-TOPSIS based decision support system for packaging machine selection

Selecting the appropriate manufacturing machine is a very important and complex problem for firms which usually have to deal with both qualitative and quantitative criteria and involve different decision makers whose knowledge is often vague and imprecise.This paper proposes a peer-based modification to intuitionistic fuzzy multi-criteria group decision making with TOPSIS method (peer IF-TOPSIS) and applies it to a packaging machine selection problem. Intuitionistic fuzzy weighted averaging (IFWA) operator has been selected both to obtain the group opinion on the relevance of the single decision makers and to aggregate individual opinions of decision makers for rating the importance of criteria and alternatives.A case study illustrates the application of the modified IF-TOPSIS method in order to select a Vertical Form Fill and Seal (VFFS) for Double Square Bottom Bag (DSBB) machine in food packaging.     

基于曲线积分的任意多边形填充算法

多边形域填充是图形图像处理中最基本的操作之一。文章结合代数曲线积分思想与活性边表技术,提出了一种新的任意多边形代数积分算法。与传统多边形域填充算法相比,新算法不但能实现任意多边形域(如带孔区域、自相交区域)的有效填充,而且具有速度快、效率高的特点。因此有效解决了任意矢量图形转换为光栅图形的技术困难,经过在手写字符填充及多边形区域特征值计算上大量应用证明,该算法在矢量与光栅转换、字符填充、多边形区域特征值计算上有很强的实用价值。