matlab 手动画mask并保存

I = imread('family.jpg');
[H,W,~] = size(I);
gray = rgb2gray(I);
subplot(2, 2, 1); 
imshow(I, []);
title('Original Image'); 
hFH = drawfreehand();

binaryImage = hFH.createMask();
subplot(2, 2, 2); 
imshow(binaryImage); 

title('Binary mask of the region');
save('mask2','binaryImage')