how can i find max intensity from cell image

Question

Filza Ashraf 2014-5-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/129828-how-can-i-find-max-intensity-from-cell-image

编辑： Image Analyst 2014-5-18

R.jpg

i have divided my image into several cells by mat2cell function

if size(R)==[512,512];
else
R =imresize(R,[512,512]);
end
div = [128,128,128,128]; % block s
    if true
      % code
    endize would be 128*128 and division of 
  %images would be 4*4 blocks
Br = mat2cell(R,div,div); % Division of Reference image into Blocks.
Br_r = size(Br,1);
Br_c = size(Br,2);
for i =1: Br_r*Br_c;
    subplot(Br_r,Br_c,i);
  figure(1),imshow(Br{i});
end

but now i wana read the each cell and find if there is any pixel of intensity 255 i dont know how to access the pixels i have applied impixel function but it gives ERROR help me please

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Answer 1

Image Analyst 2014-5-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/129828-how-can-i-find-max-intensity-from-cell-image#answer_137017

编辑：Image Analyst 2014-5-18

在 MATLAB Online 中打开

if max(max(Br{i})) == 255
  % then do whatever you want to do
end

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Filza Ashraf 2014-5-18

sir, this code is not working it is not detecting the 255 intensity pixels

Image Analyst 2014-5-18

在 MATLAB Online 中打开

That's not exactly what you asked. You asked something slightly different and that was that if ANY pixel in the tile was 255 to do something. If you want to get a map (binary image) of where the image is 255 or not, then do this on the original image:

pixels255 = R == 255;

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