i need urgent help to understant

in code of tracking cars

in the last step in th code

      stats = regionprops(noSmallStructures, {'Centroid','Area'});
      if ~isempty([stats.Area])
          areaArray = [stats.Area];
          [junk,idx] = max(areaArray);
          c = stats(idx).Centroid;
          c = floor(fliplr(c));
          width = 2;
          row = c(1)-width:c(1)+width;
          col = c(2)-width:c(2)+width;
          taggedCars(row,col,1,k) = 255;
          taggedCars(row,col,2,k) = 0;
          taggedCars(row,col,3,k) = 0;
      end
  end

Step 5

i want to know why he assume that width = 2 and what mean by " width = 2;

          row = c(1)-width:c(1)+width;
          col = c(2)-width:c(2)+width;"

i will be thankful for helping me

[Alexandra Harkai]

why-your-question-is-not-urgent-or-an-emergency

To help people willing to help your problem, format the code using the '{} Code' button to make it readable.

[samir mohamd]

thanks

Answer 1

[Guillaume]

"i want to know why he assume that width = 2 and what mean by " width = 2;"

How should we know? We didn't write the code. Ask whoever wrote the code why they chose that value.

Note however that the name is misleading. The code actually tags the centroid with a square whose side is 2*width+1, not width.