void findSkyFromCannyImage(const Mat& cannyimg,vector<Point> (&edges)[2])
{
int width=cannyimg.cols-1;
int height=cannyimg.rows;
int currenty=2;
int currentx;
findStartX(cannyimg,currentx,currenty);
// auto sth=static_cast<int> (cannyimg.at<uchar>(Point(0,0)));
while (( grayValue(cannyimg,currentx,currenty) ==0 )&&(currenty<height))
{
int leftx(currentx),rightx(currentx);
while((leftx>1)&&(grayValue(cannyimg,--leftx,currenty)==0))
;
while((rightx<width)&&(grayValue(cannyimg,++rightx,currenty)==0))
;
edges[0].push_back(Point(leftx,currenty));
edges[1].push_back(Point(rightx,currenty));
currentx=(leftx+rightx)/2;
++currenty;
}
}
void Crosspointer::doStage2Cross() {
if(findXtoFirstSR()) findXonSpecRows();
findStartX();
}