ImageFiltering.cpp

#include<iostream>
#include "cv.h"
#include "highgui.h"
#include <cstring>
using namespace cv;
using namespace std;

int main()
{
	string path = "res/download.jpg";
	Mat src = imread(path,CV_LOAD_IMAGE_ANYCOLOR);
	if(!src.data)
	{
		cout<<"fail\n";
		return -1;
	}

	Mat blurBlock, gaussian, median, bilateral;

	int kernel_size = 5;

	// Blur operator.
	// Size defines size of kernel
	// Point is an anchor point , and here point -1,-1 defines a center point of the mask.
	// BORDER_DEFAULT specifies the border type for padding image.
	// For more explanation please read my post on filter2d.

	// Blur operator.
	blur(src,blurBlock,Size(kernel_size,kernel_size), Point(-1,-1), BORDER_DEFAULT);

	// Gaussian Filter
	// The two 0s after Size(kernel_size,kernel_size) specify the valuse of sigma1 and sigma2.
	// Here 0 and 0 represent that value of sigmax and sigmay should be calculated from the dimension of kernel
	GaussianBlur(src,gaussian,Size(kernel_size,kernel_size), 0, 0, BORDER_DEFAULT);

	// Median Blur
	// Default size of kernel.
	medianBlur(src, median, kernel_size);

	// Display the results
	namedWindow("Input",CV_WINDOW_AUTOSIZE);
	namedWindow("Block",CV_WINDOW_AUTOSIZE);
	namedWindow("Gaussian",CV_WINDOW_AUTOSIZE);
	namedWindow("Median",CV_WINDOW_AUTOSIZE);
	imshow("Input",src);
	imshow("Block",blurBlock);
	imshow("Gaussian",gaussian);
	imshow("Median",median);

	// wait for keypress event.
	waitKey(0);
	return 0;
}