Apply Blur Filter Effect on an Image

Steps to Apply Blur Filter Effect on an Image | OpenCV with Visual Studio in Windows 10. In this Tutorial, we are going to apply Blur Filter Effect on an image using OpenCV.

1. First of all, Follow this tutorial to Install & Configure OpenCV with Visual Studio 2015


2. Copy the Full Source Code to Apply Blur Filter on an Image from here:

#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>

using namespace cv;

int main()
{
 //Load an Image
 Mat img = imread("C:/Briefcase/Chess.jpg", CV_LOAD_IMAGE_COLOR);
 namedWindow("Image", CV_WINDOW_AUTOSIZE);
 imshow("Image", img);

 //Blur Effect
 GaussianBlur(img, img, cv::Size(3, 3), 0);
 namedWindow("BlurEffect", CV_WINDOW_AUTOSIZE);
 imshow("BlurEffect", img);

 //Wait Key press
 cvWaitKey(0);

 //destroy
 cvDestroyWindow("Image");
 cvDestroyWindow("BlurEffect");

 return 0;
}

OR
Get BlurEffect.cpp from Github:
Download BlurEffect.cpp


3. Paste full source code and Run it (Ctrl+F5 or F5).

OUTPUT

Load Image OpenCV

Blur Image OpenCV

Explaination : Function used: GaussianBlur(img, img, cv::Size(3, 3), 0) - This function can process images and blur an image.

• 1^st parameter is the source image.
• 2^nd parameter is the destination or resultant image which is a blur image.
• 3^rd parameter is the structuring element used.
• 4^th parameter is gaussian standard deviation in x direction (sigmaX)

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