The source code is as follows:

 # include 
# include 
# include 
# include 
# include 
using namespace cv; 
using namespace std; 
Const unsigned char FORE_GROUD=255; 
Int thresh=7; 
Mat SRC, DST, dst1; 
//ofstream fout. 

Int main () 
{
String outfilename (" test. TXT "); 
Ofstream fout (outfilename c_str ()); 
NamedWindow (" result ", 1); 
Mat SRC=https://bbs.csdn.net/topics/imread (" 1. JPG "); 
Mat DST, src1; 
CvtColor (SRC, src1, COLOR_BGR2GRAY); 
Point root_points [1] [8]. 
Root_points [0] [0]=Point (0, 0); 
Root_points [0] [1]=Point (SRC. The cols, 0); 
Root_points [0] [2]=Point (SRC) cols, 100); 
Root_points [0] [3]=Point (140100); 
Root_points [0] [4]=Point (0205); 
Root_points [0] [5]=Point (SRC) cols, 205); 
Root_points [0] [6]=Point (SRC) cols, SRC, rows); 
Root_points [0] [7]=Point (0, SRC. Rows); 
Const Point * PPT [1]={root_points [0]}. 
Int the NPT []={8}; 
Polylines (src1, PPT, NPT, 1, 1, Scalar (0), 1,8,0); 
FillPoly (src1, PPT, NPT, 1, Scalar (255)); 
MedianBlur (src1, src1, 3); 
EqualizeHist (src1, src1); 
Threshold (src1, DST, double (thresh), double (FORE_GROUD), THRESH_BINARY); 
Vector Contours. 
VectorVector Contours_poly (contours. The size ()); 
Vector BoundRect (contours. The size ()); 
FindContours (DST, contours, hierarchy, CV_RETR_TREE CV_CHAIN_APPROX_SIMPLE);//for each contour of each pixel 
for(int i=0; I & lt; Contours. The size (); I++) 
{
ApproxPolyDP (Mat (contours [I]), contours_poly [I], 3, true); 
BoundRect [I]=boundingRect (Mat (contours_poly [I])); 
//the Rect the Rect=boundingRect (Mat (contours_poly [index])); 
DrawContours (SRC, contours_poly, index, Scalar (255255255), 1, 8, hierarchy, 0, Point ()); 
A rectangle (SRC, boundRect [I]. Tl (), boundRect [I]. Br (), Scalar (255255255), 2); 
} 


//fout. Close (); 
Imshow (" result ", DST); 
Imshow (" show ", SRC); 
waitKey(0); 
Return (0); 
} 

Breakpoint moves approxPolyDP (Mat (contours [I]), contours_poly [I], 3, true); An error occurred while
Ask the great spirit show

CodePudding user response:

The subscript overflow?
The Debug under open the call stack and see the function call stack, find the error function, the first

CodePudding user response:

Collapsed in the pop-up dialog box, press the corresponding button to enter debugging press Alt + 7 key to view the Call Stack, namely "the Call Stack" from the inside to the following out of from the inner to outer function Call history, double-click a row to the cursor to the Call of the source code or assembly instruction, don't understand when double click on the next line, until we can read ,

CodePudding user response:

When you visit the vector, the subscript have cross-border operation, pay attention to your little target range