How to draw a line around for each connected components in an edge image. I tried bellow using bwboundaries() but i didn't get expected output.

Answer 1

[Image Analyst]

This snippet will work:

hold on;
boundaries = bwboundaries(binaryImage);
numberOfBoundaries = size(boundaries, 1);
for k = 1 : numberOfBoundaries
  thisBoundary = boundaries{k};
  plot(thisBoundary(:,2), thisBoundary(:,1), 'r', 'LineWidth', 2);
end
hold off;