MATLAB: Bwconncomp returns a variable with 4 fields. one of them is pixelIdxlist. it contains the connected component list.how can we extract each component and show in different images.

Question

in my code pixelIdx has 4 components:

 PixelIdxList: {[866x1 double]  [628x1 double]  [1092x1 double]  [4x1 double]}

how can I store each component in a different image so that it can b processed further..

can anyone plz help me to write the code for this..

Answer 1

You can use the regionprops function with 'Image' as the requested statistic and pass the output of bwconncomp to it. Your code would look like this:

BW = imread('text.png');
CC = bwconncomp(BW);
stats = regionprops(CC,'Image');
%Display the first component as an image
imshow(stats(1).Image);

Note that you can instead directly call regionprops on the binary image BW. regionprops will internally invoke bwconncomp for you.

stats = regionprops(BW,'Image');