How to extract the hand out of the background? (homework assignment)

Dear all, I want 'my output' image like exactly 'ouput' image. I followed step by step on the intrunction posted here.

Can anyone help me please?

clc;
close all;
clear all;
I1 = imread('hands.png');
I2 = imread('balcony.png');
gr = im2gray(I1);
threshold_value = graythresh(gr);
bw = im2bw(gr);
binary = bw<threshold_value;
binary_I = imfill(binary,'holes');
imshow(binary_I);
mask = I1;
mask(~bw) = 0;
ig = im2gray(mask);
output = bitand(ig,I2);
imshow(output);

[Image Analyst]

You forgot to post 'hands.jpg' and 'balcony.jpg'. Please do so after reading this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

[Tu Nguyen]

Yes sir, I already read and upload the images. If you know, please help me fix the code

Answer 1

[DGM]

If you're trying to create the composite image:

FG = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/924699/hands.png');
BG = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/924694/balcony.png');

mask = FG<210; % basic thresholding

outpict = uint8(double(FG).*mask + double(BG).*(~mask)); % compose image

imshow(outpict)

Alternatively, you can go to extra lengths to improve the masking:

mask = FG<210; % same thresholding
mask = imerode(mask,ones(7)); % shrink mask to remove edge banding
mask = imgaussfilt(double(mask),1.5); % feather mask back toward original edges

outpict = uint8(double(FG).*mask + double(BG).*(1-mask)); % compose

imshow(outpict)