String eleresi_ut;
cout << "Give the absolute path of the image." << endl;
cin >> eleresi_ut;
Mat img = imread(eleresi_ut + ".png", IMREAD_COLOR);
while (img.empty()) {
    cout << "Error: The desired image couldn't be loaded. Please try again!" << endl;
    cin >> eleresi_ut;
    img = imread(eleresi_ut + ".png", IMREAD_COLOR);
}
cout << "Image successfuly loaded!" << endl;

Mat hsv, dest, mask;
dest.create(img.rows, img.cols, CV_8UC3);
cvtColor(img, hsv, COLOR_BGR2HSV);

for (int i = 0; i < img.rows; ++i) {
    for (int j = 0; j < img.cols; ++j) {
        Vec3b pixel = hsv.at<Vec3b>(i, j);
        if (pixel[2] <= 10 || (pixel[2] >= 50 && pixel[2] <= 150)){
            dest.at<Vec3b>(i, j) = img.at<Vec3b>(i,j);
        }
    }
}
String hue;
cout << "Choose a value for hue in which the text will be shown: " << endl;
cin >> hue;
int ihue = stoi(hue);
Mat s = getStructuringElement(MORPH_ELLIPSE, Size(2, 2));
Mat s1 = getStructuringElement(MORPH_ELLIPSE, Size(1, 1));
Mat s2 = getStructuringElement(MORPH_ELLIPSE, Size(3, 3));
morphologyEx(dest, dest, MORPH_GRADIENT, s);
morphologyEx(dest, dest, MORPH_CLOSE, s2);
morphologyEx(dest, dest, MORPH_DILATE, s);
cvtColor(dest, dest, COLOR_BGR2HSV);
for (int i = 0; i < img.rows; ++i) {
    for (int j = 0; j < img.cols; ++j) {
        Vec3b pixel = dest.at<Vec3b>(i, j);
        if (pixel[2] > 30 ) {
            dest.at<Vec3b>(i, j)[0] = ihue;
        }
    }
}
cout << "Please provide an absolute path for the image." << endl;
String hova;
cin >> hova;
vector<int> compression;
compression.push_back(IMWRITE_JPEG_QUALITY);
compression.push_back(92);
imwrite(hova + ".jpeg", dest, compression);
imshow("result", dest);