How to download an image from github?

Question

MATLAB

I want to access the url of the image and write it down for download and display by matlab

clc;
clear;
imageUrl='https://github.com/Beginerok/Tropic-Island/blob/master/Tropic-Island/Gamedev/Demo2/Demo2/content/atlas.png';
rgb = webread(imageUrl);
tree = htmlTree(rgb);
selector = "img";
subtrees = findElement(tree,selector)
tmpr='https://github.com';
strp = string(subtrees(5));
ch=strp.char()

for j=11:1:length(ch)
    if ch(j)~='?'
        tmpr=strcat(tmpr,ch(j));
    else
        break;
    end
end
tmpr
rgb = webread(tmpr)
whos rgb
rgb = imresize(rgb, 0.6);
imshow(rgb)

In short, I get the page, I parse it, I upload it again - I get the page, the image does not get