vs2013配置OpenCV的感兴趣区域提取（车牌定位）

#include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream> using namespace std; using namespace cv; cv::Mat org, dst, img, tmp; cv::Mat src; int i = 0; void on_mouse(int event, int x, int y, int flags, void *ustc)//event鼠标事件代号，x,y鼠标坐标，flags拖拽和键盘操作的代号 { static Point pre_pt = (-1, -1);//初始坐标 static Point cur_pt = (-1, -1);//实时坐标 char temp[16]; if (event == CV_EVENT_LBUTTONDOWN)//左键按下，读取初始坐标，并在图像上该点处划圆 { org.copyTo(img);//将原始图片复制到img中 sprintf(temp, "(%d,%d)", x, y); pre_pt = Point(x, y); putText(img, temp, pre_pt, FONT_HERSHEY_SIMPLEX, 0.5, Scalar(0, 0, 0, 255), 1, 8);//在窗口上显示坐标 circle(img, pre_pt, 2, Scalar(255, 0, 0, 0), CV_FILLED, CV_AA, 0);//划圆 imshow("img", img); } else if (event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON))//左键没有按下的情况下鼠标移动的处理函数 { img.copyTo(tmp);//将img复制到临时图像tmp上，用于显示实时坐标 sprintf(temp, "(%d,%d)", x, y); cur_pt = Point(x, y); putText(tmp, temp, cur_pt, FONT_HERSHEY_SIMPLEX, 0.5, Scalar(0, 0, 0, 255));//只是实时显示鼠标移动的坐标 imshow("img", tmp); } else if (event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))//左键按下时，鼠标移动，则在图像上划矩形 { img.copyTo(tmp); sprintf(temp, "(%d,%d)", x, y); cur_pt = Point(x, y); putText(tmp, temp, cur_pt, FONT_HERSHEY_SIMPLEX, 0.5, Scalar(0, 0, 0, 255)); rectangle(tmp, pre_pt, cur_pt, Scalar(0, 255, 0, 0), 1, 8, 0);//在临时图像上实时显示鼠标拖动时形成的矩形 imshow("img", tmp); } else if (event == CV_EVENT_LBUTTONUP)//左键松开，将在图像上划矩形 { org.copyTo(img); sprintf(temp, "(%d,%d)", x, y); if (x < 0) x = 0; if (y < 0) y = 0; if (x>img.cols) x = img.cols; if (y>img.rows) y = img.rows; cur_pt = Point(x, y); putText(img, temp, cur_pt, FONT_HERSHEY_SIMPLEX, 0.5, Scalar(0, 0, 0, 255)); circle(img, pre_pt, 2, Scalar(255, 0, 0, 0), CV_FILLED, CV_AA, 0); rectangle(img, pre_pt, cur_pt, Scalar(0, 255, 0, 0), 1, 8, 0);//根据初始点和结束点，将矩形画到img上 imshow("img", img); img.copyTo(tmp); //截取矩形包围的图像，并保存到dst中 int width = abs(pre_pt.x - cur_pt.x); int height = abs(pre_pt.y - cur_pt.y); if (width == 0 || height == 0) { printf("width == 0 || height == 0"); return; } dst = org(Rect(min(cur_pt.x, pre_pt.x), min(cur_pt.y, pre_pt.y), width, height)); stringstream ss(stringstream::in | stringstream::out); ss << "img_cut_" << ++i << ".jpg"; imwrite(ss.str(), dst); namedWindow("dst"); imshow("dst", dst); waitKey(0); } } void main() { double scale = 3.0;//设置缩放倍数 src = imread("13a.jpg", IMREAD_GRAYSCALE);//灰度 Size dsize = Size(src.cols*scale, src.rows*scale); org = Mat(dsize, CV_32S); resize(src, org, dsize); //cout << "width=" << org.cols << endl; //cout << "height=" << org.rows << endl; org.copyTo(img); org.copyTo(tmp); namedWindow("img");//定义一个img窗口 setMouseCallback("img", on_mouse, 0);//调用回调函数 imshow("img", img); cv::waitKey(0); }