【20160924】GOCVHelper 图像处理部分（2）

//根据轮廓的面积大小进行选择

vector<VP> selectShapeArea(Mat src,Mat& draw,vector<VP> contours,int minvalue,int maxvalue){

vector<VP> result_contours;

draw = Mat::zeros(src.rows,src.cols,CV_8UC3);

for (int i=0;i<contours.size();i++){

double countour_area = contourArea(contours[i]);

if (countour_area >minvalue && countour_area<maxvalue)

result_contours.push_back(contours[i]);

}

for (int i=0;i<result_contours.size();i++){

int iRandB = rng.uniform(0,255);

int iRandG = rng.uniform(0,255);

int iRandR = rng.uniform(0,255);

Scalar color = Scalar(iRandB,iRandG,iRandR);

drawContours(draw,result_contours,i,color,-1);

char cbuf[100];sprintf_s(cbuf,"%d",i+1);

//寻找最小覆盖圆,求出圆心。使用反色打印轮廓序号

float radius;

cv::Point2f center;

cv::minEnclosingCircle(result_contours[i],center,radius);

putText(draw,cbuf,center, FONT_HERSHEY_PLAIN ,5,Scalar(255-iRandB,255-iRandG,255-iRandR),5);

}

return result_contours;

}

vector<VP> selectShapeArea(vector<VP> contours,int minvalue,int maxvalue)

{