How to draw rectangles along the tampered region of an image ?

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I have already determined the blocks of an image which are tampered.I want to draw a box over around this blocks and show the same in original image.Can any one please suggest any method for the same.
for i=1:64
imshow(Block0(:,:,i); %tampered block i
[x]=FirstPositionBlock(i,:); %coordinate values of the first pixel of tampered block
If J is the original image how can i get the box drawn on the image corresponding to the tempered blocks of the image.

Accepted Answer

Image Analyst
Image Analyst on 8 Feb 2015
Use rectangle():
rectangle('Position', [x(1), x(2), 32, 32]);

More Answers (2)

Erik S.
Erik S. on 8 Feb 2015
Hi You can use the function
annotation('rectangle',[x y w h])
  1 Comment
Anushka on 8 Feb 2015
Thank you for your response.
I used the statement as you said but it showed the error
"Error using annotation (line 129) position values must be between 0 and 1"
The following was what I gave in my program
annotation('rectangle',[x(1) x(2) x(1)+32 x(2)+32]);

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Erik S.
Erik S. on 8 Feb 2015
Hi, I just saw in the documentation that the inputs should be normalized. Try to divide x(1) width image width and x(2) with image height, same for rectangle width and height.
Anushka on 8 Feb 2015
I used
shapeInserter = vision.ShapeInserter;
rectangle = [g f 32 32];
J1 = step(shapeInserter, J1, rectangle);
and got small small rectangles around each block not an entire rectangle.

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