【OpenCV】随机数与随机颜色

随机数与随机颜色

RNG rng(1234);构造方法设定一个具体值，表示下面代码每次生成的结果都是一样的

完整代码

void QuickDemo::random_drawing() {
    
    
	Mat canvas = Mat::zeros(Size(512, 512), CV_8UC3);
	int w = canvas.cols;
	int h = canvas.rows;
	RNG rng(12345);
	while (true) {
    
    
		int c = waitKey(10);
		if (c == 27) {
    
     // 退出
			break;
		}
		int x1 = rng.uniform(0, w);
		int y1 = rng.uniform(0, h);
		int x2 = rng.uniform(0, w);
		int y2 = rng.uniform(0, h);
		int b = rng.uniform(0, 255);
		int g = rng.uniform(0, 255);
		int r = rng.uniform(0, 255);
		// canvas = Scalar(0, 0, 0);
		line(canvas, Point(x1, y1), Point(x2, y2), Scalar(b, g, r), 1, LINE_AA, 0);
		imshow("随机绘制演示", canvas);
	}
}

结果展示