Hi, in binary image i want to divide 'n' number frames into n/2,then in both n/2 frames, i need to calculate number of white pixels,check if that counts are larger or smaller than 'n' white pixels count.if greater again follow the same steps.

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kaavya subramani 2015-8-8

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https://ww2.mathworks.cn/matlabcentral/answers/232859-hi-in-binary-image-i-want-to-divide-n-number-frames-into-n-2-then-in-both-n-2-frames-i-need-to-c

关闭： MATLAB Answer Bot 2021-8-20

its like divide and conquer strategy,if suppose the second 'n/2' white pixel count is greater then divide it into two half and so on.Otherwise find which frame contain maximum white pixels and save it separately in array. please help me sir using matlab code

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Walter Roberson 2015-8-8

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If I understand correctly, you want your routine to take as input a group of frames. It should divide the group into two halves. The half that has more than half of the total white pixels should be sub-divided, and the half that has the most pixels out of that should be selected. But should that quarter then be sub-divided as well? Does the process keep going until you are at the point where the two halves have exactly the same number of white pixels or the point where you are down to one frame?

The collection to pass in should be either a struct array or a cell array for the following code to work

function split_collection = splitwhite(frame_collection)
  if length(frame_collection) == 1
    split_collection = frame_collection;  %got down to one frame
    return
  end
  firsthalf = frame_collection(1:end/2);
  secondhalf = frame_collection(end/2+1:end);
  first_white = number_of_white(firsthalf);
  second_white = number_of_white(secondhalf);
  if first_white > second_white
     split_collection = {splitwhite(firsthalf) secondhalf};
  elsif first_white < second_white
     split_collection - {firsthalf splitwhite(secondhalf)};
  else
     split_collection = frame_collection;  %no split if the two halves are the same
 end
end

Walter Roberson 2015-8-10

What does the "this" refers to that you are asking about?

My first line is a proof that testing that the first half holds more than half of the total is the same thing as testing that the first half holds more than the second half.

My final line was a reminder that volunteers sleep on their own schedule, not at times arranged to be convenient for you. The volunteers in North America who regularly answer questions are in GMT-4, GMT-5, and GMT-6

kaavya subramani 2015-8-11

ok sir

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Hi, in binary image i want to divide 'n' number frames into n/2,then in both n/2 frames, i need to calculate number of white pixels,check if that counts are larger or smaller than 'n' white pixels count.if greater again follow the same steps.

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Hi, in binary image i want to divide 'n' number frames into n/2,then in both n/2 frames, i need to calculate number of white pixels,check if that counts are larger or smaller than 'n' white pixels count.if greater again follow the same steps.

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