ImageProcessing/SobelOperator.cpp at main · Isurie/ImageProcessing · GitHub

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#include <iostream>

#include <opencv2/core/core.hpp>

#include <opencv2/opencv.hpp>

#include<opencv2/imgproc/imgproc.hpp>


using namespace cv;

using namespace std;


int main(int argc, char *argv[])

{

    if (argc != 3) {

        printf("Enter exeFileName imageFileName\n");

    }


	Mat image = imread(argv[1], IMREAD_COLOR);


    if (image.empty()) {

        cout << "Error: No Image to load" << endl;

    }


	Mat gr(image.rows,image.cols,CV_8UC1,Scalar(0));

	cvtColor(image,gr,COLOR_BGR2GRAY);

    Mat dest = gr.clone();


    int gx = 0;

    int gy = 0;

    int G = 0;

    int T = atoi(argv[2]);


    for (int i = 1; i < gr.rows - 1; i++) {

        for (int j = 1; j < gr.cols - 1; j++) {

            gx = 0;

            gy = 0;

            G = 0;

            gx = -(int)gr.at<uchar>(i - 1, j - 1) - 2 * (int)gr.at<uchar>(i - 1, j) - (int)gr.at<uchar>(i - 1, j + 1) + (int)gr.at<uchar>(i + 1, j - 1) + 2 * (int)gr.at<uchar>(i + 1, j) + (int)gr.at<uchar>(i + 1, j + 1);

            gy = -(int)gr.at<uchar>(i - 1, j - 1) - 2 * (int)gr.at<uchar>(i, j - 1) - (int)gr.at<uchar>(i + 1, j - 1) + (int)gr.at<uchar>(i - 1, j + 1) + 2 * (int)gr.at<uchar>(i, j + 1) + (int)gr.at<uchar>(i + 1, j + 1);


            G = abs(gx) + abs(gy);

            if (G >= T) {

                dest.at<uchar>(i, j) = 255;

            }

            else

                dest.at<uchar>(i, j) = 0;

        }

    }


	// display histogram


    namedWindow("Gray Image", 1);

    imshow("Gray Image", gr);


    namedWindow("Sobel Operator", 1);

    imshow("Sobel Operator", dest);


    waitKey();


    gr.release();

    dest.release();

    return 0;

}