期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
中医色诊图像采集系统的设计与实现及实验研究 被引量:18
1
作者 郑冬梅 郭东杰 +1 位作者 戴振东 王鸿谟 《中国生物医学工程学报》 CAS CSCD 北大核心 2011年第5期731-737,共7页
研制中医色诊图像采集系统。整体制作为箱体式上下结构,系统选择色温5 500 K的氙灯模拟日光光源,反射率大于96%的聚四氟乙烯悬浮树脂涂层积分球漫射照明,分辨率为4 752像素×3 168像素的调谐数码相机采集图像。长时间光源稳定性和... 研制中医色诊图像采集系统。整体制作为箱体式上下结构,系统选择色温5 500 K的氙灯模拟日光光源,反射率大于96%的聚四氟乙烯悬浮树脂涂层积分球漫射照明,分辨率为4 752像素×3 168像素的调谐数码相机采集图像。长时间光源稳定性和光线均匀性实验表明:图像采集系统光源稳定性大于99.1%、显色性大于95%,光线均匀性大于98.6%;不同照度下,图像色度偏差小于1.24%;40例中青年和60例老年人面部图像采集实验证明:面部图像采集系统可以用RGB和Lab颜色空间的数据准确定量人脸面部的特征色诊信息,采集的数据可为中医色诊信息的客观化研究提供参考。 展开更多
关键词 色诊 色温 照度 显色性 积分球
在线阅读 下载PDF
DEVELOPMENT AND PRELIMINARY APPLICATION OF OBJECTIFYING SYSTEM FOR TCM COLOR INSPECTION 被引量:2
2
作者 郑冬梅 戴振东 王鸿谟 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2012年第4期395-403,共9页
An objectifying system for color inspections of traditional Chinese medicine (CITCM) is developed. The entire system includes two parts : The hardware and the software. The hardware is an image acquiring device und... An objectifying system for color inspections of traditional Chinese medicine (CITCM) is developed. The entire system includes two parts : The hardware and the software. The hardware is an image acquiring device under a standard lighting condition, and it mainly includes a xenon lamp with color temperature of 5 500 K as light source, an integrating sphere used for diffusing light and a high resolution CCD camera. The software is used for digital image processing, and the procedure is divided into three steps. Firstly the skin/non-skin classifi- cation is performed by utilizing the threshold in chrominance channels of the RGB color space. Secondly, the fa- cial features are localized by using the image segmentation and coordinates sorting. Finally, the facial special re- gion(SR) corresponding to five internal organs is achieved by utilizing masks designed to take advantage of mor- phology. Subsequently, the chromaticity is calculated. The system is tested by taking 83 samples of 30 young and 53 elderly people. The experiment shows that there is significant difference of all SRs between the young and the elderly, and the system has better performance for objectifying research of CITCM. 展开更多
关键词 color inspection special region integrating sphere image processing CHROMATICITY significant dif- ference
在线阅读 下载PDF
有限时间传热的制冷循环制冷性能的热力学分析
3
作者 王鸿谟 《制冷学报》 CAS CSCD 1990年第1期21-28,共8页
对存在不可逆热损耗的内可逆制冷循环进行有限时间热力学分析。求得最佳制冷系数及有关性能与过程进行速率的关系;制冷性能与过程间的时间配置的关系;制冷性能与传热能力及源汇温度的关系;得出在给定条件下循环周期的极限。
关键词 传热学 制冷循环 制冷性能 热力学
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部