I'm debugging my code to get the largest and 2nd largest contour area using this code, but my output is very weird for the arrayarea. I put the data into the array which i had declared as float. The output as under the code. Which part i got it wrong?
float arrayarea[5];
// iterate through each contour.
for( int i = 0; i< contours.size(); i++ )
{
// Find the area of contour
double a=contourArea( contours[i],false);
arrayarea[i]=a;
cout<<" \narea="<<a<<endl;
if(a>largest_area)
{
largest_area=a;
// Store the index of largest contour
largest_contour_index=i;
// Find the bounding rectangle for biggest contour
//bounding_rect=boundingRect(contours[i]);
}
}
cout<<" \nlargest_area="<<largest_area<<endl;
cerr << "\nlargest_index=" <<largest_contour_index << endl;
std::cout << "\narray_area= " <<arrayarea<< std::endl;
waitKey(0);
first = second = INT_MIN;
for (i = 0; i < arrayarea[i] ; i ++)
{
/* If current element is smaller than first
then update both first and second */
if (arrayarea[i] > first)
{
second = first;
first = arrayarea[i];
}
/* If arr[i] is in between first and
second then update second */
else if (arrayarea[i] > second && arrayarea[i] != first)
second = arrayarea[i];
second_largest_contour_index=i;
}
if (second == INT_MIN)
printf("There is no second largest element\n");
else
printf("The second largest element is %dn", second);
printf("The second largest index is %dn", second_largest_contour_index);
waitKey(0);
Result [259.084, 55.9251] point [143.648, 32.9001] point area=2512.5 area=1346.5 largest_area=2512 largest_index=0 array_area= 00007FF7D7C12A88 The second largest element is 1346 The second largest index is 2
