Segmentation fault (core dumped) image processing c++/opencv

Amoun

I want to apply a smooth to an image,for that purpose I create the function "sum" Here's my code

double sum(cv::Mat img, int startedX, int startedY, int w) {
  double res = 0;
  std::cout << "startedX= " << startedX << "/ startedY= " << startedY <<  std::endl; 
  for (int i = startedX - ((w - 1) / 2); i < startedX + ((w + 1) / 2); i++) {
    std::cout << "i= " << i <<  std::endl;    
    for (int j = startedY - ((w - 1) / 2) ; j < startedY + ((w + 1) / 2); j++) {
      std::cout << " j= " << j <<  std::endl;
      if ((i >= 0 && i < img.size().width) && (j >= 0  && j < img.size().height)) {      
        res += img.at<float>(i,j);
      }
    }
  }
  return res;
}

This is a portion of my main function where the program crashes :

for (int k = 0; k < imgSource.size().width; k++) {
  for (int l = 0; l < imgSource.size().height; l++) {
    if( (k >= 0 && k < imgSource.size().width) && (l >= 0  && l < imgSource.size().height) ) {
      std::cout << "k= " << k <<"  l= " << l << " wmax= " << wmax << std::endl; 
      newImgMax.at<float>(k,l) =(float)sum(imgMax, k, l, wmax) / (wmax * wmax);
    }
  }
}

for k=0 and l=0 the program works fine and returns a value but for k=0 and l=1 the call of the function(sum(imgMax,0,1,1)) doesn't pass,it crashes and shows a segmentation fault core dumped.This is my output:

k= 0  l= 0 wmax= 1
startedX= 0/ startedY= 0
i= 0
j= 0
k= 0  l= 1 wmax= 1
Segmentation fault (core dumped)

quark

Looks like C++ to me :(

This forum is to support people using Processing and C++ is definitely out of scope for this forum.

GoToLoop

C++ in Processing is used for GLSL / Shaders methinks. /:)
https://forum.Processing.org/two/categories/glsl-shaders

openFrameworks is a Processing spin-off based on C++: http://OpenFrameworks.cc/

quark

I forgot about shaders, well spotted.

koogs

but that doesn't look like shader code. shader code isn't c++, it's its own thing. and the use of cout looks odd.

i think wrong forum.

GoToLoop

Shader code isn't c++, ...

But it's strongly based on C/C++ nonetheless: :\">
https://en.Wikipedia.org/wiki/OpenGL_Shading_Language

koogs

"OpenGL Shading Language (abbreviated: GLSL or GLslang), is a high-level shading language based on the syntax of the C programming language."

so not "c++" and not "strongly"