how to assign a different label the each regions localised between two markers

Question

mika 2014-1-3

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/111325-how-to-assign-a-different-label-the-each-regions-localised-between-two-markers

回答： Image Analyst 2014-1-3

采纳的回答： Image Analyst

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After detecting(marking with markers)classes based on labels below : X=[1 0 1 ; 0 1 0 ; 1 0 1 ;];

Y=[1 0 1 ; 0 1 0 ; 1 0 0 ;];

O=[0 1 0 ; 1 0 1 ; 0 1 0 ;];

-=[0 0 0 ; 1 1 1 ; 0 0 0 ;];

L=[1 0 0 ; 1 0 0 ; 1 1 1 ;];

in order to separate regions using the code below :

t = imread('I.png'); A = squelette(t); B = 2*A - 1 ;

patterns = {[1 0 1; 0 1 0; 1 0 1]; ... % X

         [1 0 1; 0 1 0; 1 0 0]; ... % Y
         [0 1 0; 1 0 1; 0 1 0]; ... % 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} )) ;
 end