摘要
提出了一种具有完全重构的二维零相位有限冲击响应 ( FIR)菱形子带滤波器组的设计方法 ,该方法采用变量代换并通过调整窗函数的参数和传递函数来改变频率特性 ,能方便、灵活地控制频率特性 .设计实例表明 ,所设计的滤波器频率特性较好 ,用设计的滤波器对一真彩色内窥镜图像进行处理 。
This paper presented a new method of designing 2dimensional linear phase FIR diamond subband filters having the perfect reconstruction property. This method can provide the flexibility of controlling the frequency characteristics of the filters with ease. The key technology of this method is to use variable transformation as a substitute for the frequency transformation presented by McClellan. The frequency characteristics are adjusted via changing the variable of window function and transformation function. The designed examples show fine frequency characteristics. A true color endoscope image was processed by a designed filter and fine results were arrived.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2000年第6期840-844,共5页
Journal of Shanghai Jiaotong University
基金
国家教委重点科研项目资助 !(95Y-15)
关键词
图像处理
完全重构
FIR菱形子带滤波器组
image processing
perfect reconstruction
filters
frequency response
McClellan transformation
zero-phase
