opencv图像像素算术运算+逻辑运算

1、像素的算术运算：

void QuickDemo::OperatorTest(Mat &image)
{
	Mat res;
	Mat m1 = Mat::zeros(image.size(), image.type());
	
	m1 = Scalar(50, 50, 50);
	add(image, m1, res);//加法
	imshow("add",res);
	subtract(image,m1,res);//减法
	imshow("subtract",res);
	m1 = Scalar(2,2,2);
	multiply(image, m1, res);//乘法
	imshow("multiply",res);
	divide(image, m1, res);//除法
	imshow("divide",res);
}

2、像素的逻辑运算：

void QuickDemo::bitwise_demo(Mat &image)
{
	Mat m1 = Mat::zeros(Size(4, 4), CV_8UC1);
	Mat m2 = Mat::zeros(Size(4, 4), CV_8UC1);

	m1 = Scalar(0xFF);
	m2 = Scalar(0x0F);

	std::cout << "m1的值：" << std::endl;
	std::cout << m1 << std::endl;
	std::cout << "m2的值：" << std::endl;
	std::cout << m2 << std::endl;

	Mat dst = Mat::zeros(Size(4, 4), CV_8UC1);
	bitwise_and(m1, m2, dst);
	std::cout << "逻辑与\n" << dst<<std::endl;
	bitwise_or(m1, m2, dst);
	std::cout << "逻辑或\n" << dst << std::endl;
	bitwise_xor(m1, m2, dst);
	std::cout << "逻辑异或\n" << dst << std::endl;
	bitwise_not(m1, dst);
	std::cout << "逻辑反\n" << dst << std::endl;
}

测试结果：

带颜色逻辑运算：

void QuickDemo::bitwise_demo(Mat &image)
{
	Mat m1 = Mat::zeros(Size(255, 255), CV_8UC3);
	Mat m2 = Mat::zeros(Size(255, 255), CV_8UC3);

	rectangle(m1, Rect(100, 100, 80, 80), Scalar(255, 255, 0), -1, LINE_8, 0);
	rectangle(m2, Rect(150, 150, 80, 80), Scalar(0, 255, 255), -1, LINE_8, 0);
	imshow("m1", m1); imshow("m2",m2);
	Mat dst;

	bitwise_and(m1, m2, dst);
	imshow("bitwise_and", dst);
	bitwise_or(m1,m2,dst);
	imshow("bitwise_or",dst);
	bitwise_xor(m1, m2, dst);
	imshow("bitwise_xor", dst);
	bitwise_not(image,dst);
	imshow("bitwise_not", dst);

填充/绘边函数介绍：rectangle()

函数原型：
CV_EXPORTS_W void rectangle(InputOutputArray img, Rect rec,
const Scalar& color, int thickness = 1,
int lineType = LINE_8, int shift = 0);
功能：绘制一个简单的，粗的，或填充的右上矩形
矩形函数的作用是:绘制一个矩形的轮廓或填充矩形
@img：图像
@rec：填充位置/大小
@color：颜色
@thickness：组成矩形的线条的厚度。负值，比如# fill，意味着函数要画一个填充的矩形。-1代表全部填充，正值代表绘轮廓
@lineType：行类型。看LineTypes；这个是为了绘图防止轮廓锯齿现象，推荐LINE_8，LINE_AA 会很慢

/** types of line
@ingroup imgproc_draw
*/
enum LineTypes {
    FILLED  = -1,
    LINE_4  = 4, //!< 4-connected line
    LINE_8  = 8, //!< 8-connected line
    LINE_AA = 16 //!< antialiased line
};

@shift：点坐标中的小数位数。