how to Remove pixels at the marker locations from A binary image?

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mika 2014-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/111922-how-to-remove-pixels-at-the-marker-locations-from-a-binary-image

评论： Image Analyst 2014-1-20

can any one give me an idea please.

help is much appreciated

thank you.

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mika 2014-1-11

can any one help me please!

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Image Analyst 2014-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/111922-how-to-remove-pixels-at-the-marker-locations-from-a-binary-image#answer_120456

编辑：Image Analyst 2014-1-9

在 MATLAB Online 中打开

Just go down your list setting those pixels to false

for k = 1 : length(rows)
  binaryImage(rows(k), columns(k)) = false;
end

where rows and columns are arrays with the locations of the red crosses.

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mika 2014-1-10

编辑：Image Analyst 2014-1-10

在 MATLAB Online 中打开

Hello Analyst,

you have right thank you,i'm just starting with matlab .

i don't succed to show all patterns in one plot and when i set pixels to false i got a white plot, changes in the code below :

patterns = {[1 0 1; 0 1 0; 1 0 1]; ... % X
  [1 0 1; 0 1 0; 1 0 0]; ... % Y
  [-1 1-1; 1-1 1; -1 1-1]; ... % O
  [0 0 0; 1 1 1; 0 0 0]; ... % -
  [1 0 0; 1 0 0; 1 1 1] ;} ;   % L
labels   = {'X', 'Y', 'O', '-', 'L'} ;
matches  = cell( size(labels )) ;
for pId = 1 : numel( patterns )
  nel    = numel( patterns{pId} ) ;
  ker    = 2*patterns{pId} - 1 ;
  [r, c] = find( conv2(B, rot90(rot90(ker)), 'full') == nel ) ;
  matches{pId} = [r, c] ;
  figure(pId) ;
  clf ;
  hold on ;
  spy(A) ;
  
  plot( c, r, 'r+', 'MarkerSize', 2 ) ;
  title( sprintf( 'Matches for "%s" pattern', labels{pId} )) ;
  for pId = 1 : length(r)
    binaryImage(r(pId), c(pId)) = false;
  end
  %set( gcf, 'Units', 'normalized' ) ;
  %set( gcf, 'Position', [0 0 0.4 0.7] ) ;
end
figure(pId) ;
clf ;
hold on ;

mika 2014-1-20

Please reply.

thank you.

Image Analyst 2014-1-20

I'm most likely not going to be able to carve enough time out of my day to do all that for you. Can't you find anyone else that you work with to help you?

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