How to hightlight the mask in a image

If I'm in Mathematica, I just run

I can get what I want, but I cannot find the corresponding function in Matlab? How to implement it? This is my test image

Answer 1

[Anton Semechko]

Here you go:

im=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/119871/test1.png'); % grayscale
bw=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/119872/test2.png'); % binary
B=bwboundaries(bw);                                                                           % shape contours

% Superimpose contours on grayscale image
figure('color','w')
imshow(im)
hold on
for i=1:numel(B)
    h=fill(B{i}(:,2),B{i}(:,1),'r');
    set(h,'FaceAlpha',0.6,'EdgeColor','r','LineWidth',2)
end