MATLAB: Segment grid boxes

boundarybraillefeature extractiongridimage segmentation

rgb = imread('peppers.png');
imshow(rgb)
hold on
M = size(rgb,1);
  N = size(rgb,2);
    for k = 1:25:M
        x = [1 N];
        y = [k k];
        plot(x,y,'Color','w','LineStyle','-');
        plot(x,y,'Color','k','LineStyle',':');
    end
    for k = 1:25:N
        x = [k k];
        y = [1 M];
        plot(x,y,'Color','w','LineStyle','-');
        plot(x,y,'Color','k','LineStyle',':');
    end
    hold off
Suppose I want to segment and extract individual areas of the grid .. How do I go about it ? Like, which boundary detection algorithm is used for this purpose ?

Best Answer

Regular rectangular grids, or potentially irregular spacing?
If it is a regular rectangular grid, crop to contain only full cells, detect the grid line separation, then mat2cell() or blkproc() or blockproc()
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