i need urgent help to understant

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samir mohamd
samir mohamd 2017-2-17
评论： samir mohamd 2017-2-18
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
  2 个评论
Alexandra Harkai
Alexandra Harkai 2017-2-17
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.

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回答（1 个）

Guillaume
Guillaume 2017-2-17
"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.

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