bandstop filter matlab

Median Filtering is a classic algorithm. Today, I read the paper and I know that there is also an algorithm called adaptive median filter ramf. The original paper is here. Ramf processes images in the following two steps. 1. First determine the maximum filtering radius, and then use an appropriate radius R to filter the image. Calculate the Imin, IMAX, and imed of the pixel gray scale of the Current

I have a software on my phone to implement a lot of image filters, very interesting, I intend to try.This filter is mainly for old photo effects.The code is short, and I won't go into it in detail.Original:Post-processing effects:The MATLAB code is as follows:Clear All;close all;clc;img=imread ('lena_rgb.jpg'); [H W K]=size (IMG); Imshow (IMG); R=double (IMG (:,:,1)); G=double (IMG (:,:,2)); B=double (IMG (

In real-time image acquisition, it is unavoidable to introduce noise, especially interference noise and salt and pepper noise, the existence of noise has serious effect on edge detection, median filter is a kind of nonlinear smoothing count based on ranking statistic theory, can effectively smooth noise, and can effectively protect the edge information of image. So it is widely used in the edge extraction of digital image processing, the basic princip

pepper noiseSubplot (222); imshow (J1 );F = double (J1); % data type conversion. MATLAB does not support the calculation of unsigned integer types of images.G = fft2 (f); % Fourier TransformationG = fftshift (g); % convert the Data Matrix[M, N] = size (g );Nn = 2; % second-order Butterworth low-pass filterD0 = 50;M = fix (M/2); n = fix (n/2 );For I = 1: mFor j = 1: ND = SQRT (I-m) ^ 2 + (J-N) ^ 2 );H = 1/(1 + 0.414 * (D/D0) ^ (2 * NN); % calculate th

Function: The serial data is received after filtering, and before and after the filtering data display, the data can be saved to see the spectrum. This routine: 1, the serial port data received and have the protocol decoding (here everyone download, you can modify, or contact me to help modify) 2. Data after analysis, dynamic filtering 3, the data before and after filtering are displayed, easy to compare. File list FFT: Use this function for spectral analysis of the saved data. Myfilt