【图像处理】OpenCV截图小工具

还存在一些小Bug，需要改进。

#include <istream>

#include <opencv2/opencv.hpp>
#include <opencv2/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include  <sys/timeb.h>
/*
Demo 显示原始图片,然后鼠标切割获取截取图片
*/
using namespace std;
using namespace cv;
bool cutFlag = false;
bool drawRectFlag = false;
void listenMouse(int event, int x, int y, int flag, void* param);
void drawRect(cv::Mat& img, cv::Rect box);
Rect rect;
RNG c_rand(12345);
string winName_s;
int winIndex = 1;
int main()
{
	try
	{
		char * srcWinName = "window";
		Mat tempImg;
		rect = Rect(10, 10, 200, 200);
		//读取原始图片
		Mat srcImg = imread("E://OpenCV//OpenCV_Image//lenafull.jpg");
		//Mat srcImg(320, 568, CV_8UC3), tempImage;
		//namedWindow(srcWinName, 0);
		//resizeWindow(srcWinName, 320 , 568);
		//drawRect(srcImg , rect);
		//srcImg.copyTo(tempImg);
		imshow(srcWinName, srcImg);
		setMouseCallback(srcWinName, listenMouse, (void*)&srcImg);
		//tempImg = srcImg(rect);
		//imshow("win2", tempImg);
		waitKey(0);
	}
	catch (const std::exception& e)
	{
		cout << "Exception :: " << e.what() << endl;
	}
	return 0;
}

/*

* 鼠标回调方法

*/

void listenMouse(int event, int x, int y, int flag, void* param)
{
	Mat& image = *(cv::Mat*) param;
	Mat tempImg;
	image.copyTo(tempImg);
	switch (event)
	{
	case EVENT_MOUSEMOVE:
	{
		cout << "鼠标移动" << "x : " << x << "y : " << y << endl;
		if (cutFlag)
		{
			rect.width = x - rect.x;
			rect.height = y - rect.y;
		}
		if (drawRectFlag)
		{
			drawRect(tempImg, rect);
			imshow("window", tempImg);
		}
	}
	break;
	case EVENT_LBUTTONDOWN:
	{
		cout << "鼠标按下" << "x : " << x << "y : " << y << endl;
		cutFlag = true;
		drawRectFlag = true;
		rect = Rect(x, y, 0, 0);
	}
	break;


	case EVENT_LBUTTONUP:
	{
		cout << "Up" << "x : " << x << "y : " << y << endl;
		cutFlag = false;
		drawRectFlag = false;
		if (rect.width <= 0 || rect.height <= 0)
		{
			break;
		}
		if (rect.width <= 0)
		{
			rect.x += rect.width;
			rect.width *= -1;
		}
		if (rect.height <= 0)
		{
			rect.y += rect.height;
			rect.height *= -1;
		}
		//drawRect(image, rect);
		Mat cutTempImg = image(rect);
		imshow("window", image);
		imshow("window_" + to_string(winIndex), cutTempImg);
		winIndex++;
	}
	default:
		break;
	}
}


/*

* 画矩形

*/

void drawRect(cv::Mat& img, cv::Rect box)
{
	cout << "rectBox" << box << endl;
	rectangle(img, box.tl(), box.br(), Scalar(64, 64, 255));
}