摘要
介绍了CCD数据采集系统中为检测物体尺寸,提取边缘特性阈值的几种方法,即固定阈值法、浮动阈值法和比较阈值法。总结了它们的优缺点,指出不同方法的应用环境。同时,提出了新的差分阈值方法,并深入研究了基于硬件系统的PWM软件调节阈值法。
The different methods to choose threshold to test the size of objects in data acquisition and process system are introduced, which are fixed threshold method, float threshold method, and compare threshold method. By comparing these methods and summarizing their strong points and weak points, the article puts forward their different applicable condition and presents a new differential threshold method.
出处
《天津工程师范学院学报》
2006年第1期18-21,共4页
Journal of Tianji University of Technology and Education
基金
教育部科学技术研究重点项目(02012).
关键词
数据采集
阈值
差分
data acquisition
threshold
differential
