线性图像混合

 g(x)=(1-a)f0(x)+af1(x)

阿尔法通道值可以调节透明度

Mat src1, src2, dst;
	double alpha = 0.5;
	double gamma = 1 - alpha;
	src1 = imread("img/6.jpg");
	src2 = imread("img/5.jpg");
	src1 = src1(Rect(0, 0, 500, 300));
	src2 = src2(Rect(0, 0, 500, 300));

	addWeighted(src1, alpha, src2, gamma, 0, dst);
	imshow("1",src1);
	imshow("2", src2);
	imshow("End", dst);