滤波器与伪彩色变换，

1。一个通用的高通、低通、带通和带阻滤波器函数

2。又分别实现理想、巴特沃思和指数等滤波形式

3。伪彩色处理

内附设计文档。-Filter and pseudo-color transformation, 1. A common high-pass, low pass, band pass and band stop filter function 2. Respectively realize the ideal, Butterworth and index filtering form 3. Pseudo-color handle enclosing the design documents.