停止无限循环
我一直试图使用OpenCV和C ++在二维灰度图像中追踪曲面的轮廓（线条），但是我一直运行到无限循环。 我尝试了各种调试，但无法纠正我的问题。 请帮忙！
我的图像如下所示：http://snag.gy/fAs9a.jpg（第四张图片）
这是我的“初始”轮廓看起来像：http://snag.gy/fAs9a.jpg（第五图像）
这是我迄今为止所做的：
问题：即使我的逻辑听起来很合理，我的代码也看起来很合理，但我仍然陷入无限循环。 在当前列中可能没有找到像素大于阈值的像素。
调试：我调试了我的代码以确定无限循环发生的位置，并发现它位于main函数中while循环下的if-else代码块中。
我已经没有想法如何删除我的错误。 再次，非常感谢帮助！
这是我的代码：
// function to get the neigbourhood pattern
bool checkLBP(unsigned char *GMOtemp, unsigned char *contour, int &row, int &col, int width, int thresh)
{
const int arrSize = 9;
const int semiArrSize = 6;
// for first column, need only 6 neighbours
// since it is at one end of the image
if( col == 0 ) {
int array [semiArrSize];
// start storing values in the array
array[0] = GMOtemp[(row*width) + (col)];
array[1] = GMOtemp[((row+1)*width) + (col)];
array[2] = GMOtemp[((row+2)*width) + (col)];
array[3] = GMOtemp[(row*width) + (col+1)];
array[4] = GMOtemp[((row+1)*width) + (col+1)];
array[5] = GMOtemp[((row+2)*width) + (col+1)];
int cnt = 0;
for(int i = 0; i<semiArrSize; i++) {
if(array[i] >= thresh) {
cnt++;
}
}
printf("n cnt %d n",cnt);
if( cnt >= 2 ) {
return true;
}
else {
return false;
}
}
// for last column, need only 6 neighbours
else if( col == width - 1) {
int array [semiArrSize];
// start storing values in the array
array[0] = GMOtemp[(row*width) + (col)];
array[1] = GMOtemp[((row+1)*width) + (col)];
array[2] = GMOtemp[((row+2)*width) + (col)];
array[3] = GMOtemp[(row*width) + (col-1)];
array[4] = GMOtemp[((row+1)*width) + (col-1)];
array[5] = GMOtemp[((row+2)*width) + (col-1)];
int cnt = 0;
for(int i = 0; i<semiArrSize; i++) {
if(array[i] >= thresh) {
cnt++;
}
}
printf("n cnt %d n",cnt);
if( cnt >= 2 ) {
return true;
}
else {
return false;
}
}
else {
int array [arrSize];
// start filling all the elements
array[0] = GMOtemp[((row)*width) +(col-1)];
array[1] = GMOtemp[((row)*width) +(col)];
array[2] = GMOtemp[((row)*width) +(col+1)];
array[3] = GMOtemp[((row+1)*width) +(col-1)];
array[4] = GMOtemp[((row+1)*width) +(col)];
array[5] = GMOtemp[((row+1)*width) +(col+1)];
array[6] = GMOtemp[((row+2)*width) +(col-1)];
array[7] = GMOtemp[((row+2)*width) +(col)];
array[8] = GMOtemp[((row+2)*width) +(col+1)];
int cnt = 0;
for(int i = 0; i<arrSize; i++) {
if(array[i] >= thresh) {
cnt++;
}
}
printf("n cnt %d n",cnt);
if( cnt >= 1) {
return true;
}
else {
return false;
}
}
}
主要（）
// ... previous code to do blurring of the image.
// code to get the point-coordinates from the "initial mask" image
std::vector<int> setC;
std::vector<int> setR;
for(int xc = 0; xc < input.cols; xc++) {
for(int xr = 0; xr < input.rows; xr++) {
int val = mask[xr*input.cols + xc];
if(val == 255) {
//setC[i] = xc;
//setR[i] = xr;
//i++;
setC.push_back(xc);
setR.push_back(xr);
}
}
}
// get the LBP pattern
// LBP PATTERN IS A 3X3 NEIGHBOURHOOD
std::vector<int>::iterator mc1 = setC.begin();
std::vector<int>::iterator mr1 = setR.begin();
int rr = 0;
int cc = 0;
int width = input.cols;
//rowcount = 0;
int infiniteCount = 0;
unsigned char *GMOtemp;
unsigned char *contour;
GMOtemp = (unsigned char*) malloc(sizeof(unsigned char) * input.rows * input.cols);
contour = (unsigned char*) malloc(sizeof(unsigned char) * input.rows * input.cols);
memcpy(GMOtemp, OCVout2.data, sizeof(unsigned char) * input.rows * input.cols);
memset(contour, 0, sizeof(unsigned char) * input.rows * input.cols);
while( (mc1 != setC.end()) && (mr1 != setR.end()) ) {
//looping:
rr = *mr1; // get row and col
cc = *mc1;
printf("n %d %d n", rr, cc);
rr++; // increment the row
bool result = checkLBP(GMOtemp, contour, rr, cc, width, sum);
//printf("n %d n", rr);
if(result == true)
{
contour[rr*width + cc] = 255; // set current point to be equal to 255
mc1++; // increment the vector iterators - so, go to next column
mr1++;
}
else {
do{
rr++;
result = checkLBP(GMOtemp, contour, rr, cc, width, sum);
infiniteCount++;
//printf("n rr %d n", rr);
//printf("n %d n", infiniteCount);
if (rr == (input.rows - 1) || infiniteCount == 200) {
contour[rr*width + cc] = 255;
mr1++;
mc1++;
infiniteCount = 0;
result = true;
break;
}
//printf("n rr %d n", rr);
} while(result == false);
}
你正在试图摆脱这种while( (mc1 != setC.end()) && (mr1 != setR.end()) ) {}循环，对吗？ 如果是这样，你已经把你的break放在了错误的地方。
这个break只会在你的do{...}while(result==false)循环中爆发出来， do{...}while(result==false)不是你很大的while循环。 一个提示是使用FLAG。 如果问题仍然存在，请告诉我。 和平。
我通过强制if..else代码块从当前行循环到for循环的最后一行来解决我的无限循环。 这是代码：
while( mm < ind ) {
// 'ind' corresponds to number of coordinate-sets = 254
// I used two arrays here, each was set to 256 (width of image).
int rr = setR[mm]; // get row and col
int cc = setC[mm];
//printf("n %d %d n", rr, cc);
rr = rr + skiprows; // increment row; to skip if needed (skiprows = 0 now)
bool result = checkLBP(GMOtemp, rr, cc, width, height, sum);
//printf("n %d n", rr);
if(result == true)
{
if(rr<height){
contour[rr*width + cc] = 255; // set current point to be equal to 255
mm++;
}
}
else {
int check = 0; // boolean check variable - to see if none of the neighbors of a given pixel are greater
rr = rr + skiprows; // increment row
for(int currRow = rr; currRow < height; currRow = currRow+skiprows)
{
result = checkLBP(GMOtemp, currRow, cc, width, height, sum);
if( result == true)
{
contour[currRow*width + cc] = 255;
mm++;
check = 1;
break; // break out of for-loop
}
}
if(check == 0)
{
mm++;
}
}
}