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排序方式: 共有186条查询结果,搜索用时 15 毫秒
1.
小波变换在手写体汉字识别中的应用 总被引:5,自引:0,他引:5
汉字识别中的结构类特征具有抗变形的优点,合适做为手写体识别过程使用,但其中笔划特征的提取非常困难。本文用小波变换这一图象分析中有力工具对汉字图象分析处理之后,再进行笔划的提取,其过程简洁、明晰。 相似文献
2.
视频监控的在屏交互过程中,需要快速地对交互控件、感兴趣区域、活动标记等图形和图像进行绘制,为避免画面的停滞感,要求图形设备接口能快速进行绘制.为此,提出了一种笔画模型方法.利用 DirectX的原始绘制能力,该方法将绘制任务转换成笔画对象,使视频系统在实时运行过程中,只需将已转换的笔画对象的绘制数据提交给 DirectX 进行渲染和显示即可,降低重复绘制时间,满足系统的快速绘制要求.基于笔画模型方法,开发了一种可快速绘制的图形设备接口. 相似文献
3.
随着现代医学技术的飞速发展,脑卒中患者的死亡率相对下降,但脑卒中以其高致残率的特点,仍然是困扰我国医护人员跟患者的难题。针对我国认知语言障碍患者特点,结合MoCA(Montreal Cognitive Assessment蒙特利尔认知评估量表)、MMSE(mini-mental state examination简易智能精神状态检查量表)、NCSE(Neurobehavioral Cognitive Status Examination神经行为认知状况测试)等认知评定量表,设计了一套集数据管理分析及训练为一体的认知语言功能康复软件系统。该系统的研发和应用以虚拟环境技术结合临床实践经验作为基础,能够对不同方面的认知语言功能进行治疗和训练。此外,与系统配套使用的符合人体工学的触屏式操作台的设计,使患者训练操控更为简单。 相似文献
4.
《Ergonomics》2012,55(12):1175-1183
The effect of caffeine on circulation and metabolism was studied during a discontinuous maximal oxygen uptake (VO2 max) test on a bicycle ergometer. Eight male subjects were chosen for their minimal use of caffeine of which six normally did not ingest caffeinated beverages. Two caffeinated and two decaffeinated (control) trials were administered to each subject following double-blind and counterbalanced testing procedures. One hour before exercise, subjects ingested decaffeinated coffee with or without 350 mg of caffeine anhydrous added. Cardiac output (Q) was measured by a C02 rebreathing technique. Compared to control trials, caffeine increased the VO2 max by an average of 140ml min?1 (p <0-0·5)l. In addition, during caffeine trials, the average maximal heart rate (HR max) was elevated by 5 beats min?1 (p<0·01). There were no other statistically significant changes in metabolic (VO2 and R) and cardiovascular (Q, HR, SV and (a-v) 02 diff) variables during either submaximal or maximal exercise. Performance, as measured by total exercise time on the VO2 max test, was not significantly different (p>0·05). It was concluded that caffeine has a small physiological but a statistically significant effect on VQ2 max and HR max. During submaximal exercise, caffeine did not significantly effect the cardiovascular system. 相似文献
5.
《Behaviour & Information Technology》2012,31(2):165-178
Increased use of mobile phones and associated services in China highlights the need for effective Chinese input methods for mobile devices. Mapping thousands of characters to a standard telephone keypad is a significant challenge. Structure-based methods provide an appealing known-character/known-code solution, but assigning multiple strokes to each key forces users to learn new, often unfamiliar, mappings. Using an established stroke input method, our study revealed important effects of keypad legend on performance. Novice user performance was evaluated with several alternative keypad designs. The results confirmed that both abstract symbols and concrete examples helped improve the usability of the keypad in Chinese text-entry tasks. Further, combining abstract symbols and concrete examples resulted in performance nearly tripling as compared to the original design. The stroke-to-key mapping accuracy also increased significantly. Handwriting analysis confirmed that the reduced errors are directly associated with the keypad-based text-entry technique. 相似文献
6.
为了保证栅格文字的印刷效果,通常需要在印前对栅格文字的笔画粗细进行调整。本文提出一种亚像素级调整方法,基于栅格文字的邻域窗口分析,做到范围和方向可控的调整。该方法将栅格文字图看作前景文字和背景图层叠加的结果,执行图文分离,计算文字部分各点的油墨浓度,通过邻域内笔画形态分析,调整其油墨浓度,调整后的文字效果可以类比矢量文字粗细调整的效果。该方法能适应于全局或任意方向(如纵向、横向、斜向等)的粗细调整,实验表明该方法效果良好,很有实用价值。 相似文献
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9.
基于细化的西夏字笔划提取方法研究 总被引:1,自引:0,他引:1
西夏文字字数多、字形复杂、形态相似的字多,受手工书写因素的影响,同一个字的模式变化很大。文章提出了一种西夏字笔划提取方法。 相似文献
10.
Extracting perceptually meaningful strokes plays an essential role in modeling structures of handwritten Chinese characters for accurate character recognition. This paper proposes a cascade Markov random field (MRF) model that combines both bottom-up (BU) and top-down (TD) processes for stroke extraction. In the low-level stroke segmentation process, we use a BU MRF model with smoothness prior to segment the character skeleton into directional substrokes based on self-organization of pixel-based directional features. In the high-level stroke extraction process, the segmented substrokes are sent to a TD MRF-based character model that, in turn, feeds back to guide the merging of corresponding substrokes to produce reliable candidate strokes for character recognition. The merit of the cascade MRF model is due to its ability to encode the local statistical dependencies of neighboring stroke components as well as prior knowledge of Chinese character structures. Encouraging stroke extraction and character recognition results confirm the effectiveness of our method, which integrates both BU/TD vision processing streams within the unified MRF framework. 相似文献