共查询到17条相似文献,搜索用时 156 毫秒
1.
提出了一种用于手持显示器设备的提升显示小曲线轮廓字体的还原质量算法。本算法由三个步骤组成,首先根据字体曲线的曲率动态离散曲线,利用小字体在低像素的特点,根据斜率和分辨率的大小进行去冗余操作,最后对字体边缘进行微调。实验结果表明,本算法提高了小曲线轮廓字体的字形显示质量,降低了对设备的内存需求,提高了字体的显示速度。 相似文献
2.
字符自动刺绣编针技术的研究 总被引:5,自引:0,他引:5
提出一种基于TrueType字体的字符自动刺绣编针算法FONTEM。该算法直接根据中英文字符的TrueType字体信息,利用Bezier曲线的递推规则,实现字体轮廓的自动化编针,在该算法基础上还实现了字符串自动编针算法,FONTEM算法无需字体转换,对字体编针的自动化处理十分合理,大大提高了字符绣的自动化程度,其效果精细,并已得到实际的应用,重点介绍了FONTEM算法的实现技术和应用实例。 相似文献
3.
本文描述了用于CADT系统中的矢量字体转置和变形的设计思想与实现技术,并给出几种主要的算法,这些算法应用于刺绣画稿辅助创作系统,效果良好,满足了刺绣画稿中的各种字体的要求。 相似文献
4.
5.
TrueType字体技术的研究分析与应用 总被引:1,自引:0,他引:1
为了在应用程序中显示汉字的笔画,介绍了采用曲线轮廓描述技术的TrueType字体,研究分析了TrueType字形描述技术原理和TrueType文件结构,利用字体创建软件建立了汉字笔画的TrueType字体文件。 相似文献
6.
7.
针对移动终端的特点,结合汉字组件技术以及矢量笔画字体提出一种字库存储结构,并针对笔画字体提出一种轮廓化算法.在字库中将汉字信息分为索引、汉字结构信息、汉字组件矢量数据信息3个部分来存储,具有占用空间小、合成速度快的优点,解决了以往汉字组件字体失真的问题.轮廓化算法根据笔画线段信息,只需遍历一次就可完成多边形轮廓的确定,且其中优化了生成的多边形顶点数量,考虑了遍历过程中的异常情况,降低了渲染负担.该算法也可经过少许改动成为通用的描边算法.在移动终端上进行实验的结果表明,使用该字库及相应轮廓化算法取得了良好的效果. 相似文献
8.
Outline字体结构式压缩算法及其实现 总被引:2,自引:0,他引:2
针对CJK Outline字体在存储量上存在的不足,本文提出一种结构式压缩算法。算法对CJK字体进行集合变换,得到笔划集合元素;并利用聚类算法得到模板笔划;对相似数据进行统一存储与调用。同时,本文还提出了一种基于笔划段的笔划抽取算法,从图论角度实现了集合变换。结果显示,算法取得了较好的效果,而且适用于多种字体。 相似文献
9.
time 《数字社区&智能家居》2003,(14):92-92
在网页中加入三维字体,可以让你的网页增色不少!本文的目的是:通过一个对照例子,让你能够轻松地在网页中实现三维字体,让你快速入门!如果你是初学者,只要一分钟,就可以学会了! 相似文献
10.
CAPP系统中动态创建TrueType字体的研究 总被引:3,自引:0,他引:3
在CAPP系统的二次开发中,特殊符号(粗糙度及公差等)的输入输出问题一直是个难题,一般采用Windows自带的造字程序将所有特殊符号生成TrueType字体,然后用区位输入法输入处理。这种方法的弊端在于字体是静态生成的,字形及数量不可扩展,使用人员不能任意输入,而采用动态生成TrueType的方式可以生成任意字符且不受数量的限制,因而从根本上解决了特殊符号的处理问题。文章在分析了TrueType字体文件格式的基础上,给出了动态创建TrueType字体的解决方案及在CAPP系统中的应用实例。 相似文献
11.
As collections of archived digital documents continue to grow the maintenance of an archive, and the quality of reproduction from the archived format, become important long‐term considerations. In particular, Adobe's portable document format (PDF) is now an important ‘final form’ standard for archiving and distributing electronic versions of technical documents. It is important that all embedded images in the PDF, and any fonts used for text rendering, should at the very minimum be easily readable on screen. Unfortunately, because PDF is based on PostScript technology, it allows the embedding of bitmap fonts in Adobe Type 3 format as well as higher‐quality outline fonts in TrueType or Adobe Type 1 formats. Bitmap fonts do not generally perform well when they are scaled and rendered on low‐resolution devices such as workstation screens. The work described here investigates how a plug‐in to Adobe Acrobat enables bitmap fonts to be substituted by corresponding outline fonts using a checksum matching technique against a canonical set of bitmap fonts, as originally distributed. The target documents for our initial investigations are those PDF files produced by LATEX systems when set up in a default (bitmap font) configuration. For all bitmap fonts where recognition exceeds a certain confidence threshold replacement fonts in Adobe Type 1 (outline) format can be substituted with consequent improvements in file size, screen display quality and rendering speed. The accuracy of font recognition is discussed together with the prospects of extending these methods to bitmap‐font PDF files from sources other than LATEX. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
12.
13.
14.
VxWorks5.5采用点阵字库实现字体显示,这种字库设计简洁,应用广泛,但一个字库只能对应一种字体的一种大小,在不确定使用何种字体的情况下,这种传统的字体显示方式便不能够满足需求。通过使用TrueType字库和FreeType字体引擎相结合的方式,能实现多种字体、任意大小的显示功能。主要介绍了TrueType、FreeType技术的基本原理,以及在VxWorks5.5下如何将WindML、FreeType和TrueType三者相结合实现矢量字体显示的方法。 相似文献
15.
吴刚 《计算机工程与应用》2010,46(35):228-230
隐式多项式曲线用来描述数据点集合轮廓具有良好的性质,并已经获得广泛的应用。研究一般商业数据的特点,将一维商业数据变换成二维商业数据,使用隐式多项式曲线对其进行拟合描述,计算这些隐式多项式曲线的相似性,进而实现对商业数据的相似性计算分析。实验结果证明了算法的有效性。 相似文献
16.
Digital typefaces for computer graphics and multimedia applications should be capable of supporting operations such as font variations, transformations. deformations and blending. A powerful implementation of such operations must rely on the inherent typographic attributes of the typeface. However, even today's most advanced typeface representations support only geometric outline representations and basic font variations. In this paper we discuss high-level typeface representations which we term Parametric Typographic Representations (PTRs). We present an algorithm for automatically extracting typographic elements of typefaces from their outline representation, which, is an essential initial step in converting typefaces from outline representations to PTRs. The extracted typographic elements include serifs, bars. sterns, slants, bows, arcs, curve stems and curve bars. Most notable is the treatment of serifs, which are represented by finite-automata. The algorithm only needs to learn a serif type once, and is then capable of automatically recognizing it in different typefaces. We show an application of a PTR for automatic high-quality hinting of fonts, which is one of the most important stages in, digital font production. Our system was used to generate hints for dozens of thousands of Kanji, Roman and Hebrew characters. 相似文献
17.
An extension algorithm for B-splines by curve unclamping 总被引:2,自引:0,他引:2
Shi-Min HuAuthor Vitae Chiew-Lan TaiAuthor VitaeSong-Hai ZhangAuthor Vitae 《Computer aided design》2002,34(5):415-419
This paper presents an algorithm for extending B-spline curves and surfaces. Based on the unclamping algorithm for B-spline curves, we propose a new algorithm for extending B-spline curves that extrapolates using the recurrence property of the de Boor algorithm. This algorithm provides a nice extension, with maximum continuity, to the original curve segment. Moreover, it can be applied to the extension of B-spline surfaces. Extension to both single and multiple target points/curves are considered in this paper. 相似文献