opencv:绘图

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一、画一条直线

void cvLine(CvArr* array,CvPoint pt1,CvPoint pt2,CvScalar color,int thickness = 1,int connectivity = 8);

二、画一个矩形

void cvRectangle(CvArr* array,CvPoint pt1,CvPoint pt2,CvScalar color,int thickness = 1);

三、画圆形和椭圆

void cvCircle(CvArr* array,CvPoint center,int radius,CvScalar color,int thickness = 1);void cvEllipse(CvArr* img,CvPoint center,CvSize axes,double angle,double start_angle,double end_angle,Cvscalar color,int thickness = 1,ing line_type = 8);void cvEllipseBox(CvArr* img,CvBox2D box,CvScalar color,int thickness = 1,int line_type = 8,int shift = 0);

四、画多边形

void cvFillPoly(CvArr* img,CvPoint** pts,int* npts,int contours,CvScalar color,int line_type = 8);void cvFillConvexPoly(CvArr* img,CvPoint* pts,int npts,CvScalar color,int line_type = 8);void cvPolyLine(CvArr* img,CvPoint** pts,int* npts,int contours,int is_closed,CvScalar color,int thickness = 1,int line_type = 8);

五、字体和文字

void cvPutText(CvArr* img,const char* text,CvPoint origin,const CvFont* font,CvScalar color);void cvInitFont(CvFont* font,int font_face,double hscale,double vscale,double shear = 0,int thickness = 1,int line_type = 8);

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