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這是一個利用butter filter 的bandstop 來濾除原始訊號中有雜訊的方法，先轉為spectrogram觀察雜訊所分步頻帶與能量，再依照要濾除的部分作bandstopa(This is a use of bandstop butter filter to filter out the noise of the original signal has a method, the first step into a spectrogram observation noise and energy of the band, then follow to filter out parts for bandstopa)

说明：  岭回归的matla源程序，主要用于解决无法求逆或需要更好的解时所用的(Ridge regression matla source, mainly used to solve the inverse can not be a better solution or need to use when)

图像加噪，平滑使质量下降；图像的空域增强；中值滤波器；(Image denoising, smooth added that quality drop Image airspace strengthened Median filter)

两种数据读取的方法，希望能给matlab的初学者一定的借鉴，能学点就学点吧学弟学妹们加油啊(Two kinds of data read method, the hope can give matlab beginners reference, can learn some schooling point it drove to the lower classwoman refueling ah)

图像空域锐化增强，用matlab分别实现Roberts、Sobel、Priwitt算子的锐化处理，以及实现拉普拉斯图像和原始图像叠加的增强处理(Image airspace sharpening, respectively, to achieve with matlab Roberts, Sobel, Priwitt operator sharpening, and achieve enhancement Laplace image and the original image overlay)

Adaptive thrsholding, OTSU method and also performing bluring in order to test for the above thresholding techniques

说明：  《先进PID控制 MATLAB仿真(第二版）》一书的源程序("advanced PID control MATLAB (2nd edition)," a book of the source)

This is the Adaboost matlab code.

Delta function and its differential

hidden markov viterbi