Gaussian(잡음 추가) in C++

void noise_gaussian() {
	//이미지 저장
	Mat src = imread("C:/Users/givemebro/Desktop/flo.png", IMREAD_GRAYSCALE);
	
	if (src.empty()) {
		cerr << "Image load failed!" << endl;
		return;
	}

	imshow("src", src);
	// stddev : 10, 20, 30
	for (int stddev = 10; stddev <= 30; stddev += 10) {
		Mat noise(src.size(), CV_32SC1);
		randn(noise, 0, stddev);

		Mat dst;
		add(src, noise, dst, Mat(), CV_8U);
		// CV_8U : 영상 깊이
		String desc = format("stddev = %d", stddev);
		putText(dst, desc, Point(10, 30), FONT_HERSHEY_SIMPLEX, 1.0, Scalar(255,0,0), 1, LINE_AA);
		imshow("dst", dst);
		waitKey();
	}
	destroyAllWindows();
}
int main() {


	noise_gaussian();

	return 0;
}