//寻找曲线 ：

void findLines(Mat &binaryImg, vector> &outLines)

{

//八邻域

vector neighborPtVec;

neighborPtVec.push_back(Point(-1,-1));

neighborPtVec.push_back(Point(0,-1));

neighborPtVec.push_back(Point(1,-1));

neighborPtVec.push_back(Point(1,0));

neighborPtVec.push_back(Point(1,1));

neighborPtVec.push_back(Point(0,1));

neighborPtVec.push_back(Point(-1,1));

neighborPtVec.push_back(Point(-1,0));

Point firstPt;

while (findFirstPoint(binaryImg, firstPt))

{

deque line;//点的队列

line.push_back(firstPt);//存储第一个点

//由于第一个点不一定是线段的起始位置，

//因此两个方向都要查找

Point currPt = firstPt;//当前点

int currFlag = 0;//标志

Point nextPt;//下一个点

int nextFlag;//下一点的标志

while (findNextPoint(neighborPtVec, binaryImg, currPt, currFlag, nextPt, nextFlag))//一端

{

line.push_back(nextPt);//压入队列

currPt = nextPt;

currFlag = nextFlag;

}

//找另一端

currPt = firstPt;

currFlag = 0;

while (findNextPoint(neighborPtVec, binaryImg, currPt, currFlag, nextPt, nextFlag))

{

line.push_front(nextPt);

currPt = nextPt;

currFlag = nextFlag;//邻域与中心像素的位置

}

if (line.size() > 10)

{

outLines.push_back(line);

}

}

}