1 #include "opencv2/opencv.hpp"
2 using namespace cv;
3 void main()
4 {
5
//外接矩形的查找绘制
6
Mat srcImg =imread("E://12.jpg");
7
imshow("src",srcImg);
8
Mat dstImg = srcImg.clone();
//原图备份
9
cvtColor(srcImg, srcImg, CV_BGR2GRAY); //转为灰度图
10
threshold(srcImg, srcImg, 100, 255, CV_THRESH_BINARY); //二值化
11
12
vector<vector<Point>> contours;
13
vector<Vec4i> hierarcy;
14
findContours(srcImg, contours, hierarcy, CV_RETR_EXTERNAL, CHAIN_APPROX_NONE); //查找轮廓
15
vector<Rect> boundRect(contours.size()); //定义外接矩形集合
16
//drawContours(dstImg, contours, -1, Scalar(0, 0, 255), 2, 8);
//绘制轮廓
17
int x0=0, y0=0, w0=0, h0=0;
18
for(int i=0; i<contours.size(); i++)
19
{
20
boundRect[i] = boundingRect((Mat)contours[i]); //查找每个轮廓的外接矩形
21
drawContours(dstImg, contours, i, Scalar(0, 0, 255), 2, 8);
//绘制轮廓
22
x0 = boundRect[i].x;
//获得第i个外接矩形的左上角的x坐标
23
y0 = boundRect[i].y; //获得第i个外接矩形的左上角的y坐标
24
w0 = boundRect[i].width; //获得第i个外接矩形的宽度
25
h0 = boundRect[i].height; //获得第i个外接矩形的高度
26
rectangle(dstImg, Point(x0, y0), Point(x0+w0, y0+h0), Scalar(0, 255, 0), 2, 8); //绘制第i个外接矩形
27
}
28
imshow("boundRect", dstImg);
29
waitKey(0);
30 } 1 #include "opencv2/opencv.hpp"
2 #include<iostream>
3 using namespace cv;
4 using namespace std;
5 void main()
6 {
7
//分割硬币轮廓
8
Mat srcImg =imread("E://33.png");
9
imshow("src", srcImg);
10
Mat dstImg = srcImg.clone();
//原图备份
11
cvtColor(srcImg, srcImg, CV_BGR2GRAY); //转为灰度图
12
threshold(srcImg, srcImg, 100, 255, CV_THRESH_BINARY); //二值化
13
Mat element = getStructuringElement(MORPH_RECT, Size(3, 3), Point(-1, -1)); //获得结构元素
14
dilate(srcImg, srcImg, element); //膨胀操作
15
imshow("dilate",srcImg);
16
17
vector<vector<Point>> contours;
18
vector<Vec4i> hierarcy;
19
findContours(srcImg, contours, hierarcy, CV_RETR_EXTERNAL, CHAIN_APPROX_NONE); //查找轮廓
20
vector<Rect> boundRect(contours.size()); //定义外接矩形集合
21
int x0=0, y0=0, w0=0, h0=0,num=0;
22
for(int i=0; i<contours.size(); i++)
23
{
24
boundRect[i] = boundingRect((Mat)contours[i]); //查找每个轮廓的外接矩形
25
drawContours(dstImg, contours, i, Scalar(0, 0, 255), 2, 8);
//绘制轮廓
26
x0 = boundRect[i].x;
27
y0 = boundRect[i].y;
28
w0 = boundRect[i].width;
29
h0 = boundRect[i].height;
30
if(w0>30 && h0>30)//筛选
31
{
32
rectangle(dstImg, Point(x0, y0), Point(x0+w0, y0+h0), Scalar(0, 255, 0), 2, 8); //绘制第i个外接矩形
33
num++;
34
}
35
}
36
cout<<"硬币数量："<<num;
37
imshow("boundRect", dstImg);
38
waitKey(0);
39 } 1 #include "opencv2/opencv.hpp"
2 using namespace cv;
3 void main()
4 {
5
//---简单车牌字符分隔
6
Mat srcImg =imread("E://Car2.jpg");
7
Mat dstImg = srcImg.clone();
//原图备份
8
medianBlur(srcImg, srcImg, 5);
//中值滤波
9
cvtColor(srcImg, srcImg, CV_BGR2GRAY); //转为灰度图
10
threshold(srcImg, srcImg, 100, 255, CV_THRESH_BINARY); //二值化
11
imshow("threshold", srcImg);
12
imwrite("F://car0.jpg", srcImg);
13
14
vector<vector<Point>> contours;
15
vector<Vec4i> hierarcy;
16
findContours(srcImg, contours, hierarcy, CV_RETR_TREE, CHAIN_APPROX_NONE); //查找所有轮廓
17
vector<Rect> boundRect(contours.size()); //定义外接矩形集合
18
int x0=0, y0=0, w0=0, h0=0;
19
for(int i=0; i<contours.size(); i++)
20
{
21
boundRect[i] = boundingRect((Mat)contours[i]); //查找每个轮廓的外接矩形
22
x0 = boundRect[i].x;
23
y0 = boundRect[i].y;
24
w0 = boundRect[i].width;
25
h0 = boundRect[i].height;
26
if(w0>srcImg.cols/12 && w0<srcImg.cols/5 && h0>srcImg.rows/6 && h0<srcImg.rows*5/6)
27
{
28
char pic_name[10];
29
sprintf(pic_name, "F:\\%d.bmp", i);
30
Mat ROI = dstImg(Rect(x0, y0, w0, h0));
31
imwrite(pic_name, ROI);
32
rectangle(dstImg, Point(x0, y0), Point(x0+w0, y0+h0), Scalar(0, 255, 0), 2, 8); //绘制第i个外接矩形
33
}
34
}
35
imshow("boundRect", dstImg);
36
waitKey(0);
37 }}