Region Growing OpenCv c/c++ with onMouse - c++

Question

I am encountering an issue with my code. I aim to generate three seeds at different locations in the image and observe the pixels growing. I am using the onMouse function to select the areas, however, only the last point is being recognized. What changes do I need to make for this code to function correctly?
Pont seed,seed2,seed3;
bool clicked = false;
void onmouse(int event, int x, int y, int flags, void* userdata)
{
if (event == EVENT_LBUTTONDOWN) {
seed = Point2i(y, x);
seed2 = Point2i(y, x);
seed3 = Point2i(y, x);
clicked = true;
}
}
int main() {
string path = "C:/img_4.jpg";
Mat im_gray = imread(path, IMREAD_GRAYSCALE);
Mat im_new;
int threshold = 50;
imshow("Image", im_gray);
setMouseCallback("Image", onmouse, NULL);
while (!clicked) {
waitKey(0);
}
regionGrowing_teste1(im_gray, im_new, seed, seed2, seed3, threshold);
imshow("Segmented", im_new);
waitKey(0);
return 0;
}
Mat regionGrowing_teste1(Mat& src, Mat& dst, Point2i seed1, Point2i seed2, Point2i seed3, int threshold) {
dst = Mat::zeros(src.rows, src.cols, CV_8UC1);
vector<Point2i> queue1, queue2, queue3;
queue1.push_back(seed1);
queue2.push_back(seed2);
queue3.push_back(seed3);
int intensity1 = (int)src.at<uchar>(seed1);
int intensity2 = (int)src.at<uchar>(seed2);
int intensity3 = (int)src.at<uchar>(seed3);
int x, y;
while (!queue1.empty() || !queue2.empty() || !queue3.empty()) {
if (!queue1.empty()) {
Point2i p = queue1.back();
queue1.pop_back();
x = p.x; y = p.y;
if (x > 0 && x < src.rows - 1 && y > 0 && y < src.cols - 1) {
if ((int)dst.at<uchar>(x, y) == 0) {
int intensityNeighbor = (int)src.at<uchar>(x, y);
if (abs(intensity1 - intensityNeighbor) < threshold) {
dst.at<uchar>(x, y) = 255;
queue1.push_back(Point2i(x + 1, y));
queue1.push_back(Point2i(x - 1, y));
queue1.push_back(Point2i(x, y + 1));
queue1.push_back(Point2i(x, y - 1));
}
}
}
}
if (!queue2.empty()) {
Point2i p = queue2.back();
queue2.pop_back();
x = p.x; y = p.y;
if (x > 0 && x < src.rows - 1 && y > 0 && y < src.cols - 1) {
if ((int)dst.at<uchar>(x, y) == 0) {
int intensityNeighbor = (int)src.at<uchar>(x, y);
if (abs(intensity2 - intensityNeighbor) < threshold) {
dst.at<uchar>(x, y) = 255;
queue2.push_back(Point2i(x + 1, y));
queue2.push_back(Point2i(x - 1, y));
queue2.push_back(Point2i(x, y + 1));
queue2.push_back(Point2i(x, y - 1));
}
}
}
}
// process points in queue3
if (!queue3.empty()) {
Point2i p = queue3.back();
queue3.pop_back();
x = p.x; y = p.y;
if (x > 0 && x < src.rows - 1 && y > 0 && y < src.cols - 1) {
if ((int)dst.at<uchar>(x, y) == 0) {
int intensityNeighbor = (int)src.at<uchar>(x, y);
if (abs(intensity3 - intensityNeighbor) < threshold) {
dst.at<uchar>(x, y) = 255;
queue3.push_back(Point2i(x + 1, y));
queue3.push_back(Point2i(x - 1, y));
queue3.push_back(Point2i(x, y + 1));
queue3.push_back(Point2i(x, y - 1));
}
}
}
}
}
for (int i = 0; i < src.rows; i++) {
for (int j = 0; j < src.cols; j++) {
if (dst.at<uchar>(i, j) == 0) {
dst.at<uchar>(i, j) = src.at<uchar>(i, j);
}
}
}
return dst;
}
I hope to see the placement of three points and watch them grow.