demo地址：
https://github.com/GoldenRocking/OpenCV_iOS
一.直线：
void cvLine{
CvArr* array, //一般为一个图像类型的指针IplImage*
CvPoint pt1, //起始点坐标
CvPoint pt2, //结束点坐标
CvScalar color, //颜色
int thickness = 1, // 线的粗细（像素）
int connectivity = 8 //反走样模式
}
二.矩形：
void cvRectangle{
CvArr* array,
CvPoint pt1, //顶点坐标1
CvPoint pt2, //顶点坐标2
CvScalar color, //颜色
int thickness = 1, // 线的粗细（像素）
}
三.圆：
void cvCircle{
CvArr* array,
CvPoint center, //圆心
int radius, //半径
CvScalar color, //颜色
int thickness = 1, //线的粗细（像素）
int connectivity = 8 //反走样模式
}
四.椭圆：
void cvEllipse{
CvArr* array,
CvPoint center, //圆心
CVSize axes, //椭圆的长短半轴长度
double angle, //偏离主轴的角度
double start_angle, //弧度开始位置的角度
double end_angle, //弧度结束位置的角度
CvScalar color, //颜色
int thickness = 1, //线的粗细（像素）
int connectivity = 8 //反走样模式
}
五.椭圆(外接矩形)：
void cvEllipse{
CvArr* array,
CvBox2D box,
CvScalar color, //颜色
int thickness = 1, //线的粗细（像素）
int connectivity = 8， //反走样模式
int shift = 0
}
//CvBox2D的数据结构:
tydef struct {
CvPoint2D32f center;
CvSize2D32f size;
float angle;
} CvBox2D
六.多边形
void cvFillPoly{
CvArr* img,
CvPoint** pst,
int* npts,
int contours,
CvScallar color,
int line_type = 8
}
void cvFillConvexPoly{
CvArr* img,
CvPoint* pst,
int npts,
CvScallar color,
int line_type = 8
}
void cvPolyLine{
CvArr* img,
CvPoint** pst,
int* npts,
int contours,
int is_closed,
CvScallar color,
int thickness = 1,
int line_type = 8
}
下面我们根据基本绘图函数，来绘制两张图像。
先创建一个绘图的工具：
#ifndef drawTool_hpp
#define drawTool_hpp
#include <stdio.h>
using namespace cv;
void MyEllipse(Mat img,double angle,int w);
void MyFilledCircle(Mat img,cv::Point center);
void MyPolygon( Mat img,int w);
void MyLine( Mat img, cv::Point start, cv::Point end );
#endif /* drawTool_hpp */
#include "drawTool.hpp"
void MyEllipse(Mat img,double angle,int w)
{
int thickness = 2;
int lineType = 8;
ellipse(img,
cv::Point(w/2.0,w/2.0),
cv::Size(w/4.0,w/16.0),
angle,
0,
360,
Scalar(255,0,0),
thickness,
lineType
);
}
void MyFilledCircle(Mat img,cv::Point center)
{
int thickness = -1;
int lineType = 8;
cv::circle( img,
center,
300/32.0,
cv:: Scalar( 0, 0, 255 ),
thickness,
lineType );
}
void MyPolygon( Mat img,int w )
{
int lineType = 8;
/** 创建一些点 */
cv::Point rook_points[1][20];
rook_points[0][0] = cv::Point( w/4.0, 7*w/8.0 );
rook_points[0][1] = cv::Point( 3*w/4.0, 7*w/8.0 );
rook_points[0][2] = cv::Point( 3*w/4.0, 13*w/16.0 );
rook_points[0][3] = cv::Point( 11*w/16.0, 13*w/16.0 );
rook_points[0][4] = cv::Point( 19*w/32.0, 3*w/8.0 );
rook_points[0][5] = cv::Point( 3*w/4.0, 3*w/8.0 );
rook_points[0][6] = cv::Point( 3*w/4.0, w/8.0 );
rook_points[0][7] = cv::Point( 26*w/40.0, w/8.0 );
rook_points[0][8] = cv::Point( 26*w/40.0, w/4.0 );
rook_points[0][9] = cv::Point( 22*w/40.0, w/4.0 );
rook_points[0][10] = cv::Point( 22*w/40.0, w/8.0 );
rook_points[0][11] = cv::Point( 18*w/40.0, w/8.0 );
rook_points[0][12] = cv::Point( 18*w/40.0, w/4.0 );
rook_points[0][13] = cv::Point( 14*w/40.0, w/4.0 );
rook_points[0][14] = cv::Point( 14*w/40.0, w/8.0 );
rook_points[0][15] = cv::Point( w/4.0, w/8.0 );
rook_points[0][16] = cv::Point( w/4.0, 3*w/8.0 );
rook_points[0][17] = cv::Point( 13*w/32.0, 3*w/8.0 );
rook_points[0][18] = cv::Point( 5*w/16.0, 13*w/16.0 );
rook_points[0][19] = cv::Point( w/4.0, 13*w/16.0) ;
const cv::Point* ppt[1] = { rook_points[0] };
int npt[] = { 20 };
fillPoly( img,
ppt,
npt,
1,
Scalar( 255, 255, 255 ),
lineType );
}
void MyLine( Mat img, cv::Point start, cv::Point end )
{
int thickness = 2;
int lineType = 8;
line( img,
start,
end,
Scalar( 0, 0, 0 ),
thickness,
lineType );
}
首先，我们绘制一个基本的原子：:
const int w = 300;
/// 创建空全黑像素的空图像
Mat atom_image = Mat::zeros(w, w, CV_8UC3);
/// 1. 画一个简单的原子。
/// 1.a. 创建椭圆
MyEllipse(atom_image, 90,w);
MyEllipse(atom_image, 0,w);
MyEllipse(atom_image, 45,w);
MyEllipse(atom_image, -45,w);
/// 1.b. 创建圆
MyFilledCircle( atom_image, cv::Point( w/2.0, w/2.0) );
UIImageView *img = [[UIImageView alloc]init];
img.frame = CGRectMake(10, 0, w, w);
[img setImage:[cvprocess UIImageFromCVMat:atom_image ]];
[self.view addSubview:img];
然后，我们再绘制一个赌棍:
调用:
/// 创建空全黑像素的空图像
Mat rook_image = Mat::zeros(w, w, CV_8UC3);
/// 2. 画一个赌棍
/// 2.a. 创建一个凸多边形
MyPolygon( rook_image ,w);
/// 2.b. 创建矩形
rectangle( rook_image,
cv::Point( 0, 7*w/8.0 ),
cv::Point( w, w),
Scalar( 0, 255, 255 ),
-1,
8 );
/// 2.c. 画几条直线
MyLine( rook_image, cv::Point( 0, 15*w/16 ), cv::Point( w, 15*w/16 ) );
MyLine( rook_image, cv::Point( w/4, 7*w/8 ), cv::Point( w/4, w ) );
MyLine( rook_image, cv::Point( w/2, 7*w/8 ), cv::Point( w/2, w ) );
MyLine( rook_image, cv::Point( 3*w/4, 7*w/8 ), cv::Point( 3*w/4, w ) );
UIImageView *img2 = [[UIImageView alloc]init];
img2.frame = CGRectMake(10, 320, w, w);
[img2 setImage:[cvprocess UIImageFromCVMat:rook_image ]];
[self.view addSubview:img2];
运行结果:
AA79CD99-C49D-4EB4-8540-913F225197A2.png
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