How can I put an image over another in a specific coordinate?

How can I put an image over another in a specific coordinate?

This is what I have:

row=256;

col=256;

img=ones(row,col)

branco=imshow(img)

hold on

row1=100;

col1=100;

img1=zeros(row1,col1) this is the "black image" I need in a specific coordinate

preto=imshow(img1) (90,70)

Answer 1

[Image Analyst]

See my attached demos. One copies and pastes a small image over a larger canvass image. The other sets up a small axes inside another larger axes, both holding images.

Answer 2

[David Hill]

row=256;
col=256;
img=ones(row,col);
img(100:190,100:170)=0;%why not just override the image at the pixel locations
imshow(img)

Answer 3

[Voss]

Here is a thing you can try:

row=256;
col=256;
img=ones(row,col);
branco=imshow(img);
hold on
row1=100;
col1=100;
img1=zeros(row1,col1); % this is the "black image" I need in a specific coordinate               

% specify the XData and YData of the black image to set its location:
preto = imshow(img1,'XData',90+[0 row1],'YData',70+[0 col1]); % (90,70)

% turn on the axes so you can see coordinates
set(gca(),'Visible','on')